Question

state chemical properties of non metals

Answer 1

Non-metals have a tendency to gain or share electrons with other atoms. They are electronegative in character.
Nonmetals, when reacting with metals, tend to gain electrons (typically attaining noble gas electron configuration) and become anions:

Nonmetal + Metal -> Salt

3Br2(l)+2Al(s)→2AlBr3(s)(7.6.9)
(7.6.9)3Br2(l)+2Al(s)→2AlBr3(s)
Compounds composed entirely of nonmetals are molecular substances (not ionic). They generally form acidic or neutral oxides with oxygen that that dissolve in water react to form acids:

Nonmetal oxide + water -> acid

CO2(g)+H2O(l)→H2CO3(aq)carbonic acid(7.6.10)
(7.6.10)CO2(g)+H2O(l)→H2CO3(aq)carbonic acid
(carbonated water is slightly acidic)

Nonmetal oxides can combine with bases to form salts.


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