What are metals and non-metals? Explain their physical and chemical properties. What happens when metals are burnt in air?
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Metals:- they are substances which are electropositive in nature. they have a tendency to lose electrons.
physical properties of metals:-
1) they are malleable- can be beaten into sheets.
2) they are ductile- can be drawn into wires.
3) they are sonorous- can make ringing sounds.
4) they are lustrous- shiny appearance.
5) they have high melting and boiling points, tensile strength and high density.
6) good conductors of heat and electricity.
chemical properties of metals:-
1) they form +ve ions.
2) they form oxides and hydroxide.
3) they form metallic bonds.
Non-metals:- they are substances which are electronegative in nature. they have a tendency to gain electrons.
Physical properties of non-metals:-
1) they are soft.
2) they are non-malleable.
3) they are non-ductile.
4) they are not sonorous.
5) they are poor conductors of heat and electricity.
chemical properties of non- metals:-
1) they gain atoms and form anions.
2) form ionic bond with metals and covalent bond with non-metals.
3) oxides are acidic in nature.
4) act as good oxidising agent.
when metals are burnt in air, generally metal oxide is formed as a product.
eg:- 4Mg + O2 ----> 2Mg2O.
Metals:- they are substances which are electropositive in nature. they have a tendency to lose electrons.
physical properties of metals:-
1) they are malleable- can be beaten into sheets.
2) they are ductile- can be drawn into wires.
3) they are sonorous- can make ringing sounds.
4) they are lustrous- shiny appearance.
5) they have high melting and boiling points, tensile strength and high density.
6) good conductors of heat and electricity.
chemical properties of metals:-
1) they form +ve ions.
2) they form oxides and hydroxide.
3) they form metallic bonds.
Non-metals:- they are substances which are electronegative in nature. they have a tendency to gain electrons.
Physical properties of non-metals:-
1) they are soft.
2) they are non-malleable.
3) they are non-ductile.
4) they are not sonorous.
5) they are poor conductors of heat and electricity.
chemical properties of non- metals:-
1) they gain atoms and form anions.
2) form ionic bond with metals and covalent bond with non-metals.
3) oxides are acidic in nature.
4) act as good oxidising agent.
when metals are burnt in air, generally metal oxide is formed as a product.
eg:- 4Mg + O2 ----> 2Mg2O.
Answered by
1
Answer:
elements with conduct electricity and heat are metals while while elements with didn't conductor heat and electricity are non metals
when metals are burnt in air they reacts
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