NCERT Solutions For Class 10 Science Chapter 3 – CBSE Free PDF Download
NCERT Solutions for Class 10 Science Chapter 3 – Metals and Non-Metals helps students in learning concepts given in the textbook in detail.NCERT Solutions for Class 10 Science, provides answers to all the questions printed at the end of every chapter as well as the questions included within a chapter.
These NCERT Solutions are prepared by our subject experts who are highly experienced in the education industry. The solutions created are genuine and can be referred by the students to prepare for their CBSE Science exam. The descriptive language is straightforward and easy to understand. The concepts are explained with steps, diagrams, tips to remember, shortcuts for numerical problems and tricks to remember chemical reactions and formulae.
These NCERT Class 10 Science Solutions are crafted as per the latest CBSE Syllabus 2022-23 by subject experts at BYJU’S. Students can refer and easily download the solutions pdf for free from the links given and start practicing offline as well.
Chapter 3 Metals and Non-metals
- Chapter 1 Chemical Reactions and Equations
- Chapter 2 Acids, Bases and Salts
- Chapter 4 Carbon and Its Compounds
- Chapter 5 Periodic Classification of Elements
- Chapter 6 Life Processes
- Chapter 7 Control and Coordination
- Chapter 8 How do Organisms Reproduce?
- Chapter 9 Heredity and Evolution
- Chapter 10 Light Reflection and Refraction
- Chapter 11 The Human Eye and Colourful World
- Chapter 12 Electricity
- Chapter 13 Magnetic Effects of Electric Current
- Chapter 14 Sources of Energy
- Chapter 15 Our Environment
- Chapter 16 Management of Natural Resources
Download PDF of NCERT Solutions for Class 10 Science Chapter 3 – Metals and Non-metals
Access Answers to NCERT Class 10 Science Chapter 3 – Metals and Non-metals ( All In text and Exercise Questions Solved)
In-text questions set 1 Page number 40
1. Give an example of a metal which
(i) Is a liquid at room temperature?
(ii) Can be easily cut with a knife?
(iii) Is the best conductor of heat?
(iv) Is a poor conductor of heat?
(i) Mercury is the metal which is liquid at room temperature
(ii) Sodium and potassium are the metals which can be cut with a knife
(iii) Silver is the best conductor of heat
(iv) Mercury and lead are poor conductor of heat.
2. Explain the meanings of malleable and ductile.
- Metals which can be beaten to sheets are said to be malleable
- Metals which can be drawn into thin wires are said to be ductile
In-text questions set 2 Page number 46
1. Why is sodium kept immersed in kerosene oil?
Solution: Sodium is a reactive metals, if kept open it will react with oxygen to explore and catch fire. Sodium metal is kept immersed in kerosene to prevent their reaction with oxygen, moisture and carbon dioxide of air.
2. Write equations for the reactions of
(i) iron with steam
(ii) calcium and potassium with water
Solution: (i) Iron reacts with steam to form a magnetic oxide of Fe with the liberation of H2.
3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g)
(ii) Calcium reacts with water to form calcium hydroxide and hydrogen.
Ca(s) + 2H2O(I) → Ca(OH)2(aq) + H2(g)
Potassium reacts with cold water violently immediately with evolution of H2 which catches fire.
2K(s) + 2H2O(I) → 2KOH(aq) + 2H2(g)
3. Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows
|Metal||Iron(II) sulphate||Copper(II) sulphate||Zinc sulphate||Silver Nitrate|
|C||No reaction||No reaction||No reaction||Displacement|
|D||No reaction||No reaction||No reaction||No reaction|
Use the Table above to answer the following questions about metals A, B, C and D.
- Which is the most reactive metal?
- What would you observe if B is added to a solution of Copper (II) sulphate?
- Arrange the metals A, B, C and D in the order of decreasing reactivity.
(i) Metal B is the most reactive as it gives displacement reaction with iron (II) sulphate.
(ii) When metal B is added to copper (II) sulphate solution, a displacement reaction will take place because of which the blue colour of copper (II) sulphate solution will fade and a red-brown deposit of copper will be formed on metal B.
(iii)Metal B is the most reactive because it displaces iron from its salt solution. Metal A is less reactive because it displaces copper from its salt solution. Metal C is still less reactive because it can displace only silver from its salt solution and metal D is the least reactive because it cannot displace any metal from its salt solution. Hence, the decreasing order of reactivity of the metals is B > A > C > D.
4. Which gas is produced when dilute hydrochloric acid is added to a reactive metal? Write the chemical reaction when iron reacts with dilute H2SO4.
Solution: Hydrogen gas is liberated when dilute HCl is added to a reactive metal.
Fe(s) + H2SO4(aq) → FeSO4(aq) + H2(g)
5. What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.
Solution: Zinc is more reactive (more electro positive) than iron. Therefore Zinc displaces Iron from its salt solution. The colour of ferrous sulphate is pale green, which turns colourless.
FeSO4+ Zn → ZnSO4+ Fe(s)
Light green Zinc sulphate(Colourless)
In-text questions set 3 Page number 49
1. (i) Write the electron-dot structures for sodium and oxygen.
(ii) Show the formation of Na2O and MgO by the transfer of electrons.
(iii)What are the ions present in these compounds?
Solution: (i) Sodium:
(ii) Formation of Magnesium oxide:
When magnesium reacts with oxygen, the magnesium atom transfers its two outermost electrons to an oxygen atom. By losing two electrons, the magnesium atoms form a magnesium ion (Mg2+) and by gaining two electrons, the oxygen atom forms an oxide ion (O2-).
Formation of Sodium oxide:
Two sodium atoms transfer their 2 outermost electrons to an oxygen atom. By losing two electrons, the two sodium atoms form sodium ions (2Na+). And by gaining two electrons, the oxygen atom forms an oxide ion (O2-).
(iii) The ions present in sodium oxide compound (Na2O) are sodium ions (2Na+) and oxide ions (O2-).
The ions present in Magnesium oxide compound (MgO) are magnesium ions Mg2+and oxide ions (O2-).
2. Why do ionic compounds have high melting points?
Solution: Ionic compounds are the ones which has both positive and negative charges. Hence there will be strong force of attraction between them. This make expenditure of lot of heat to break this force of attraction hence ionic compounds have high melting points.
In-text questions set 4 Page number 53
1. Define the following terms.
- Minerals are compounds (also known as elements) which are found naturally in the earth’s crust. E.g. Alums, K2SO4.Al2(SO4)3.24H2O, etc.
- Ores are minerals from which metal can be extracted Ex: Bauxite Al2O3.2H2O is the ore of Al, copper pyrite CuFeS2.All minerals are not considered as ores but all ores are also minerals.
- Ores mined from the earth are naturally contaminated with sand, rocky materials. There are impurities present in the ore which are known as gangue.
2. Name two metals which are found in nature in the free state
Solution: Gold and platinum are the two metals found in Free State in nature.
3. What chemical process is used for obtaining a metal from its oxide?
Reduction method is used to obtain metal from its oxide. Ex: Zinc oxide is reduced to metallic zinc by Heating with carbon.
ZnO + C → Zn + CO
Ex: Lead oxide is reduced to lead by heating with carbon
PbO +C → Pb + CO
In-text questions set 5 Page number 55
1. Metallic oxides of zinc, magnesium and copper were heated with the following metals.
A more reactive metal can displace a less reactive metal from its oxide. Among Zinc, Magnesium, and Copper metals, magnesium is the most reactive, copper is the least reactive metal and zinc is less reactive .The displacement reaction will take place in the following cases
2. Which metals do not corrode easily?
Solution: Gold and platinum are the metals which do not corrode easily
3. What are alloys?
Solution: An alloy is a homogeneous mixture of two or more metals, or a metal and a non-metal.
Exercise questions Page number 56-57
1. Which of the following pairs will give displacement reactions?
(a) NaCl solution and copper metal
(b) MgCl2 solution and aluminium metal
(c) FeSO4 solution and silver metal
(d) AgNO3 solution and copper metal
Solution: Option d i.e AgNO3 solution and copper is correct answer. Copper displace the silver cations (reducing them to the elemental metal), in the process copper itself being oxidised to Copper II cations (Cu2+) and going into solution. So silver metal precipitating out and a copper II nitrate solution will be remaining.
Cu(s) + 2AgNO3 (aq) → Cu(NO3)2 (aq) + 2Ag (s)
2. Which of the following methods is suitable for preventing an iron frying pan from rusting?
- Applying grease
- Applying paint
- Applying a coating of zinc
- All of the above
Solution: Answer is (c) Applying a coat of Zinc
Though applying grease and applying paint prevents iron from rusting but we cannot apply these methods on frying pan hence applying a coat of Zinc is most appropriate method to prevent an iron pan from rusting.
3. An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be
Solution: Correct answer is option (a) i.e Calcium.
Calcium reacts with oxygen to give calcium oxide. Calcium oxide is soluble in water to give Calcium Hydroxide.
Carbon forms carbon-oxide with oxygen which is gas hence option B is wrong
Silicon reacts with oxygen and forms silicon dioxide. This is insoluble in water. So option C is not correct.
Iron reacts with oxygen and forms Iron dioxide. This is insoluble in water. So option D is not correct.
4. Food cans are coated with tin and not with zinc because
(a) Zinc is costlier than tin.
(b) Zinc has a higher melting point than tin.
(c) Zinc is more reactive than tin.
(d) Zinc is less reactive than tin.
Solution: Answer is c. Food cans are coated with tin and not with zinc because Zinc is more reactive that is electro positive than tin.
5. You are given a hammer, a battery, a bulb, wires and a switch.
(a) How could you use them to distinguish between samples of metals and non-metals?
(b) Assess the usefulness of these tests in distinguishing between metals and non-metals.
- Metals are malleable and can be easily drown into sheets by hitting with hammer. On the other hand if we beat non-metals they break down and they cannot be drawn into sheets as they are non-malleable. Metals of good conductors of electricity hence they make bulb when you connect metals with a battery, wire and bulb. Similarly If non-metals are bad conductors of electricity chance they fail to lit up the bulb on connecting with wire and battery.
- These experiments can be helpful to demonstrate the malleability and electric conductivity of the metals and non-metals
6. What are amphoteric oxides? Give two examples of amphoteric oxides
Solution: Oxides that react with both acids and bases to form salt and water are known as amphoteric oxides. Examples: PbO and Al2O3.
Amphoteric oxides are the one which reacts with both acids and bases to form salt and water. Examples: Lead oxide – PbO and Aluminium oxide – Al2O3.
7. Name two metals which will displace hydrogen from dilute acids, and two metals which will not.
Solution: Zinc (Zn) and Magnesium (Mg) are the two metals which will displace Hydrogen from dilute acids as they are very reactive metals. Gold (Au) and Silver (Ag) are the metals which will not replace Hydrogen from dilute acids as these metals are less reactive.
8. In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?
Solution: In the process of electrolytic refining of metal called ‘M’, An impure and thick block of metal M. is considered as anode, Thin strip or wire of pure metal M is taken as cathode. A suitable salt solution of metal M is considered as the electrolyte.
9. Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it, as shown in figure below.
(a) What will be the action of gas on
(i) dry litmus paper?
(ii) moist litmus paper?
(b) Write a balanced chemical equation for the reaction taking place.
Solution: a) When sulphur powder is burnt in the air sulphur-di-oxide is formed.
(i) Sulphur-di-oxide does not have any effect on dry litmus paper.
(ii) Sulphur-di-oxide turn the moist litmus paper from blue to red as contact of SO2 with water turns to sulfurous acid.
(b) S(s)+ O2(g)→ SO2(g)
SO2(g) + H2O →H2SO3
10. State two ways to prevent the rusting of iron.
- Iron can be prevented from rusting by coating the surface of the iron with rust proof paints
- By applying Oil/grease on the surface of iron objects as it will prevent the iron surface to get in contact with air consisting of moisture.
11. What type of oxides are formed when non-metals combine with oxygen?
Solution: When non-metals combine with oxygen it forms either acidic or neutral oxides. Ex: N2O5or N2O3is an acidic oxide; CO is a neutral oxide.
12. Give reasons
(a) Platinum, gold and silver are used to make jewellery.
(b) Sodium, potassium and lithium are stored under oil.
(c) Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.
(d) Carbonate and sulphide ores are usually converted into oxides during the process of extraction
(a) Platinum, gold and silver are used to make jewellery for these metals are very less reactive hence they are not affected by air, water or most chemicals. These metals have a lot of luster and they are malleable and ductile in nature and also highcorrosion resistance in nature.
(b) Sodium, potassium and lithium readily react with water to produce a lot of heat. As a result, Hydrogen evolved in the reaction results in a fire. On exposure to water they react with moisture (water droplets) present in the atmosphere, In order to prevent contact with water hence these metals are stored under oil.
(c) Aluminium forms on its surface a nonreactive surface of aluminium oxide. Such coating prevents other compounds from reacting to aluminium. So aluminium is being used to produce utensils for cooking.
(d) Reducing metal oxide into free metal is easy. Additionally, because it is easier to obtain metals directly from their oxides than from their carbonates or sulphides, the carbonate and sulphide ores are first transformed to oxides to obtain the metals.
13. You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
Solution: Tarnished copper vessels being cleaned with lemon or tamarind because this sour substance contains acids which dissolve the coating of copper oxide or basic copper carbonate present on the surface or tarnished copper vessels. This makes them shining red-brown again. Hence they are very effective in cleaning tarnished copper vessels.
14. Differentiate between metal and non-metal on the basis of their chemical properties.
|When metals are heated with oxygen, they form ionic oxides which are basic in nature and form bases on dissolving with water. This turn red litmus paper to blue.||When non-Metals are heated with oxygen, they form covalent oxides which are acidic in nature which form acid on dissolving with water. This turn blue litmus paper to red.|
|They are electro positive, lose electrons readily and become a positive ion.||They are electro negative, gain electrons and become negative ions.|
|Metals are lustrous.||Non-metals are non-lustrous; graphite is the exception|
|Reducing agents.||Good oxidizing agents.|
|Metals are the good conductors of electricity and heat.||Non-metals are non-conductors of electricity and heat; graphite is the exception|
|All metals are solids except mercury.||Non-metals are in solid-liquid and gaseous states|
15. A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was upset but after a futile argument the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used?
Solution: Goldsmith used the solution called Aqua regia which is called as royal water in Latin. It is the mixture of concentrated Hydrochloric acid and concentrated nitric acid in the ratio of 3:1. Aqua regia is capable of dissolving noble metals like gold and platinum. When upper-layer of dull gold ornament is dissolved they lose their weight.
16. Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
Solution: Copper is used to make hot water tanks and not steel (an alloy of iron) because copper does not reacts with either water or steam whereas iron reacts with steams to corrode the tank.
NCERT Solutions for Class 10 Science Chapter 3- Metals and Non-metals
Elements can be categorised into two types viz, Non-Metals and Metals. Excluding mercury, all metals are solid at room temperature. Some other important properties of metals include
- They are malleable
- Good conductors of electricity and heat
- They lose their electrons to form positively charged ions
- They form basic oxides by combining with oxygen
What are amphoteric oxides?
Oxides which show basic and acidic properties are called amphoteric oxides. Examples are, zinc oxide and aluminium oxide.
What is metallurgy?
The process of extracting metal from ore and refining it is called metallurgy.
What is corrosion?
Corrosion is a phenomenon where a metal like iron is exposed to moistened air for a long period.
What are non-metals?
Non-metals are not ductile and malleable. Excluding graphite, all non-metals are bad conductors of electricity and heat. They gain electrons to form negative ions when they react with metals. Non-metals form hydrides by reacting with hydrogen. They can form oxides which are either neutral or acidic.
Key Features of NCERT Solutions for Class 10 Science Chapter 3 – Metals and Non-metals
- The information provided in theseNCERT Solutionsfor Class 10 Science Chapter 3 – Metals and Non-metals is authentic and easy to understand.
- These solutions provide answers to all the exercise questions present at the end of Chapter 3 Metals and Non-metals from NCERT Class 10 Science textbook.
- The solutions to questions asked in between the chapter have also been provided.
- NCERT Solutions for Class 10 Science Chapter 3 – Metals and Non-metals are provided by BYJU’S subject experts only after extensive research.
- These solutions will be useful for various competitive exams such as JEE, NEET, etc.
- Students can rely on these solutions to prepare for their CBSE exam as it consists of tips, shortcuts, step by step procedure and neat labelled diagrams to tackle the complex type of questions smartly.
To get NCERT Class 10 Chapter-wise solutions for other subjects, you can check outNCERT Solutions for Class 10.
Frequently Asked Questions on NCERT Solutions for Class 10 Science Chapter 3
List out the differences between metals and non metals based on their physical properties in Chapter 3 of NCERT Solutions for Class 10 Science.
The differences between metals and non metals based on their physical properties are –
1. All metals are solid at room temperature except mercury whereas the non-metals can be in solid, liquid or gas form.
2. Metals are lustrous whereas non metals are non lustrous.
3. Metals possess high density whereas non metals possess low density.
4. Metals are good conductors of heat and electricity whereas non metals are poor conductors.
5. Metals have high melting point whereas non metals have low melting and boiling point.
Mention the uses of metals and non metals explained in the Chapter 3 of NCERT Solutions for Class 10 Science.
Metals are used in electronic equipment like mobiles, TV, fridges etc. Medicines for nerve impulses, enzyme reaction and oxygen carriers make use of metals. Micronutrient metal deficiency diseases in animals and humans can also be cured by using some metals. Non metals are used as an important ingredient in chemical solutions, powerful disinfectant and as an important element in combustion in batteries.
Why should I use the NCERT Solutions for Class 10 Science Chapter 3 while preparing for the CBSE exams?
The NCERT Solutions for Class 10 Science Chapter 3 provides students with simple and step wise answers to the questions present in the textbook. The solutions are helpful to understand the method of answering the questions in the CBSE exams. Students can save their time and fasten their revision which is very effective for exam preparation. The expert teachers at BYJU’S have designed the solutions based on the CBSE guidelines and syllabus.
What are metals and nonmetals answers? ›
Metals are electropositive. Non-metals are electronegative. Oxides of metal are basic in nature. Oxides of non-metals are acidic in nature.What is metal and non metal class 10th? ›
Metals are good conductors of heat and electricity. 4. Non-metals are poor conductors of heat and electricity with the exception of graphite which is a good conductor of heat and electricity. Chemical Properties of Metals and Non-metals.What is metal Class 10 Ncert? ›
These are shiny elements that form positive ions ( cations ) and are good conductors of heat and electricity .How do QNA reproduce? ›
The different modes of reproduction in multicellular organisms are vegetative propagation, spore formation, etc. In more complex organisms like humans and animals, the reproduction is through sexual reproduction.What are the 18 nonmetals? ›
In the above table nonmetal elements are H,He,C,N,O,F,Ne,P,S,Cl,Ar,Se,Br,Kr,I,Xe,At and Rn.Is metal a chemical? ›
A metal may be a chemical element such as iron; an alloy such as stainless steel; or a molecular compound such as polymeric sulfur nitride. In physics, a metal is generally regarded as any substance capable of conducting electricity at a temperature of absolute zero.Is Diamond a metal? ›
Diamond is not a metal in anyway its just an allotrope of carbon. It does not show any physical properties or chemical properties of metals like electrical conductivity, malleability, ductility, reaction with acids or salts etc.Is zinc a metal? ›
Represented in the periodic table as Zn, zinc is a transition metal, grouped with cadmium and mercury.Is sulphur a metal? ›
sulfur (S), also spelled sulphur, nonmetallic chemical element belonging to the oxygen group (Group 16 [VIa] of the periodic table), one of the most reactive of the elements. Pure sulfur is a tasteless, odourless, brittle solid that is pale yellow in colour, a poor conductor of electricity, and insoluble in water.Is carbon a metal? ›
Carbon is a true nonmetal in every sense. Lead is a true metal. Silicon is almost completely nonmetallic; tin is almost completely metallic.
Is steel a sonorous? ›
Sonorous is the property of materials to produce deep sound. Some sonorous metals and alloys are, copper, bronze, steel, aluminium, tin, silver, iron, etc.What is alloy 10th? ›
An alloy is a homogenous mixture of two or more metals, or a metal and a non-metal. Example: Brass is an alloy formed by mixing of two metals, copper and zinc.Is water a nonmetal? ›
Interesting Facts about Nonmetals
Water is made up of the two nonmetals oxygen and hydrogen. Even counting the halogens and the noble gases there are only 18 elements in the periodic table that are considered nonmetals.
In modern periodic table there are 22 non-metals in which there are 11 gases, 1 liquid and 10 solid. Bromine occurs in the state of liquid and hydrogen, nitrogen, oxygen, chlorine etc are found in gaseous forms. But carbon, sulphur, phosphorous, iodine etc solid non-metals.Is silicon a metal? ›
silicon (Si), a nonmetallic chemical element in the carbon family (Group 14 [IVa] of the periodic table).Is metal a mineral? ›
Minerals are solid substances that have formed naturally in the Earth. They have a characteristic chemical and physical properties and usually a regular crystal structure. Most rocks that we see today are made of minerals (they are the 'ingredients' in rocks) and both precious metals and gems are subsets of minerals.Is metal ductile? ›
Metals are described as malleable (can be beaten into sheets) and ductile (can be pulled out into wires). This is because of the ability of the atoms to roll over each other into new positions without breaking the metallic bond.Is Iodine a metal? ›
Iodine is a non-metallic, dark-gray/purple-black, lustrous, solid element. Iodine is the most electropositive halogen and the least reactive of the halogens even if it can still form compounds with many elements.What is hardest metal on Earth? ›
- While there are several parameters for categorizing metals in terms of hardness, chromium (687-6500 MPa) is the hardest known metal on the planet.
- It should not be confused with Tungsten, which has the highest tensile strength of any metal.
- Tungsten in its pure form is typically brittle and can shatter on impact.
A soft, pliable metal. Below 13°C it slowly changes to a powder form. Tin has many uses. It takes a high polish and is used to coat other metals to prevent corrosion, such as in tin cans, which are made of tin-coated steel.
Is coal a metal? ›
Coal is a non metal.Is copper a shiny? ›
Copper is a shiny, red-toned metal when it's clean and polished — but over time, it can lose its luster and turn a rusty brown color.Is copper a ductile? ›
Copper can be formed and stretched into complex and intricate surfaces without breaking.Is Helium a metal? ›
On chemical properties helium is like a noble gas not a metal. It is chemically unreactive like noble gases but unlike metals; it is not electrically conductive even as a solid, unlike metals.Is graphite a metal? ›
Graphite is a form of carbon . It is a non-metal and the only non-metal that can conduct electricity.Is silver a metal? ›
Silver is a relatively soft, shiny metal. It tarnishes slowly in air as sulfur compounds react with the surface forming black silver sulfide. Sterling silver contains 92.5% silver. The rest is copper or some other metal.Is Selenium a metal? ›
Selenium is a non-metal element with atomic number 34 and an atomic mass of 78.96 (Lide 2000). Selenium belongs to Group 6 (Group VIA) of the periodic table, located between sulfur and tellurium, and resembles sulfur both in its various forms and in its compounds.What are metals and non-metals Class 8? ›
Metals are materials that are hard, lustrous, malleable, ductile, sonorous and good conductors of heat and electricity. Examples of metals are iron, copper, aluminium, calcium, magnesium, etc. Non-metals do not have properties possessed by metals. Examples of non-metals are sulphur, carbon, oxygen, phosphorus, etc.What is metal and non-metal with example? ›
Elements can be divided into metals and nonmetals and it is important to know whether a particular element is a metal or nonmetal. Metals (like copper and aluminium) are good conductors of heat and electricity, while nonmetals (such as phosphorus and sulfur) are insulators.What is difference between metal and nonmetal? ›
Metals are good conductors of heat and electricity. Non-metals are bad conductors of heat and electricity. Except for graphite which is a good conduction of electricity. Metals are lustrous and can be polished.
What are non-metals Class 9? ›
Non-metals are natural materials that do not produce heat or electricity and that are structurally brittle (can not be easily rolling, moulding, extruding or pressing). Hydrogen, carbon, nitrogen, oxygen, phosphorus, arsenic and selenium are the non-metallic elements in the periodic table.Is Diamond a metal? ›
Diamond is not a metal in anyway its just an allotrope of carbon. It does not show any physical properties or chemical properties of metals like electrical conductivity, malleability, ductility, reaction with acids or salts etc.What are the 8 uses of metals? ›
Uses of metals:
Copper and aluminium are used to make wires for carrying electric currents. Zinc is used for galvanising iron to protect iron from rusting. Silver, gold and platinum are used make jewellery. Iron, copper and aluminium metals are used to make utensils for cooking and for manufacturing machines parts.
Metals produce a sound on being struck. Calcium is a metal.It is sonorous.Is Sulphur hard or soft? ›
In contrast, materials like coal and sulphur are soft and dull in appearance. They break down into powdery mass on tapping with hammer. They are not sonorous and are poor conductors of heat and electricity.Is wood a non-metal? ›
Wood: While it seems obvious, wood is a non-metallic material that sees heavy use in the construction industry.Is copper a sonorous? ›
Copper is sonorous as on being struck it produces sound. So it is true.Why is gold called noble metal? ›
The strictest definition of a noble metal is metal with a filled electron d-band. According to this definition, gold, silver, and copper are noble metals. Another definition of a noble metal is one which resists oxidation and corrosion.Is silver a metal? ›
Silver is a relatively soft, shiny metal. It tarnishes slowly in air as sulfur compounds react with the surface forming black silver sulfide. Sterling silver contains 92.5% silver. The rest is copper or some other metal.Is K metal or nonmetal? ›
The chemical symbol K comes from kalium, the Mediaeval Latin for potash, which may have derived from the arabic word qali, meaning alkali. Potassium is a soft, silvery-white metal, member of the alkali group of the periodic chart.
What are the 20 nonmetals? ›
Metals in the first twenty elements are Lithium, Beryllium, Sodium, magnesium, Aluminum, Potassium, and calcium. Now the non-metals in the first twenty elements are Hydrogen, Helium, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Phosphorous, Sulphur, Chlorine, and Argon.What are the 12 properties of metals? ›
- Metals can be hammered into thin sheets. It means they possess the property of malleability.
- Metals are ductile. ...
- Metals are a good conductor of heat and electricity.
- Metals are lustrous which means they have a shiny appearance.
- Metals have high tensile strength. ...
- Metals are sonorous. ...
- Metals are hard.
Carbon is a true nonmetal in every sense. Lead is a true metal. Silicon is almost completely nonmetallic; tin is almost completely metallic.