Question:
Give the formulae of the compounds formed from the following sets of elements :
(a) Calcium and fluorine
(b) Hydrogen and sulphur
(c) Nitrogen and hydrogen
(d) Carbon and chlorine
(e) Sodium and oxygen
(f) Carbon and oxygen.
Solution:
(a) $\mathrm{CaF}_{2}$
(b) $\mathrm{H}_{2} \mathrm{~S}$
(c) $\mathrm{NH}_{3}$
(d) $\mathrm{CCl}_{4}$
(e) $\mathrm{Na}_{2} \mathrm{O}$
(f) $\mathrm{CO}$ and $\mathrm{CO}_{2}$.
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