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State three reasons for the following fa...

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

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(i) a) poor conductor of heat and electricity
b) `S + O_2 to SO_2
`SO_2 + H_2O to H_2SO_3`
Sulphurdioxide is acidic oxide .
ii) a) Good conductor of heat and electric
b) `2Mg + O_2 to 2Mg O`
`MgO + H_2O to Mg(OH)_2`
Magnesium oxide in nature .
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