Differentiate between metals and non-metals?
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Metals are strong and durable. Thus metals are used so
widely for making almost everything.
Example: Metals are used in making machinery, automobiles, aeroplanes, buildings, trains, satellites, gadgets, cooking utensils, water boilers...etc.
However not all metals are hard, strong and durable solids. Sodium and potassium are soft metals which can be cut with a knife. Mercury is a liquid metal.
Physical Properties of Metals
The metal base in an electric iron is for conducting heat, not electricity.
Metals are very good conductors of heat. Cooking utensils, irons, heaters, etc. are all made of metals which are good conductors of heat.
Metals can be easily shaped into wires. This property of metals is called ductility.
Metals can be easily shaped into thin flat sheets. This characteristic of metals is called malleability.
Metals make a sound when struck with hard objects. Metals can be polished to a shiny appearance.
Physical Properties of Non-metals
Non-metals are non-lustrous, non-malleable and not ductile, except for carbon fibres, which are ductile.
Non-metals are not sonorous. They do not produce any sound when hit..
Non-metals do not conduct heat and electricity except for graphite.
Chemical Properties of Non-metals
Reaction with oxygen
Non-metals react with oxygen to form their oxides. Non-metal oxides are acidic or neutral in nature.
Example:
Sulphur dioxde is an acidic oxide which forms when sulphur reacts with oxygen.
S + O2 → SO2
Sulphur dioxide when added with water forms sulphurous acid.
SO2 + H2O → H2SO3
Carbon burns partially in oxyegn to form carbon monoxide. Carbon monoxide is neutral in nature.
2C + O2 → 2CO
Example: Metals are used in making machinery, automobiles, aeroplanes, buildings, trains, satellites, gadgets, cooking utensils, water boilers...etc.
However not all metals are hard, strong and durable solids. Sodium and potassium are soft metals which can be cut with a knife. Mercury is a liquid metal.
Physical Properties of Metals
The metal base in an electric iron is for conducting heat, not electricity.
Metals are very good conductors of heat. Cooking utensils, irons, heaters, etc. are all made of metals which are good conductors of heat.
Metals can be easily shaped into wires. This property of metals is called ductility.
Metals can be easily shaped into thin flat sheets. This characteristic of metals is called malleability.
Metals make a sound when struck with hard objects. Metals can be polished to a shiny appearance.
Non-metals
exist in all the three states.
Some of the non-metals which are exists in three
states are given in table.
Physical Properties of Non-metals
Non-metals are non-lustrous, non-malleable and not ductile, except for carbon fibres, which are ductile.
Non-metals are not sonorous. They do not produce any sound when hit..
Non-metals do not conduct heat and electricity except for graphite.
Chemical Properties of Non-metals
Reaction with oxygen
Non-metals react with oxygen to form their oxides. Non-metal oxides are acidic or neutral in nature.
Example:
Sulphur dioxde is an acidic oxide which forms when sulphur reacts with oxygen.
S + O2 → SO2
Sulphur dioxide when added with water forms sulphurous acid.
SO2 + H2O → H2SO3
Carbon burns partially in oxyegn to form carbon monoxide. Carbon monoxide is neutral in nature.
2C + O2 → 2CO
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