State three reasons for the following facts:
a. Sulphur is a non metal.
b. Magnesium is a metal.

Explanation

(i) Sulphur is a non metal
1. Poor conductor of heat and electricity
2. Neither malleable nor ductile
3. `S+O_(2)toSO_(2)`
`SO_(2)+H_(2)OtoH_(2)SO_(3)`
(Sulphurous acid)
Sulphurdioxide is acidic oxide
(ii) Magnesium is a metal
Good conductor of theat adn electricity. Maleable and ductile.
`2Mg+O_(2)to2MgO`
`MgO+H_(2)OtoMg(OH)_(2)`
(Magnesium hydroxide)
Magnesium oxide is basic in nature.