1.

Indicate wheter the following pairs of elements form ionic or covalent compounds Also write their molecular formula (a) `C` and `S` (b) Na and `CI` (c ) `S` and `O` (d) Ca and `H` .

Answer» Covalent, `CS_(2)` (b) Ionic, NaCI
(c ) Covalent, `SO_(2),SO_(3)` (d) Ionic, `CaH_(2)` .


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