Question

If the valency of carbon is 4 and that of hydrogen is

then the molecular formula of methane is ${\mathrm{CH}}_4$..

Answer 1

If the valency of carbon is 4 and that of hydrogen is 1 then the molecular formula of methane is ${\mathrm{CH}}_4$

Valency is the combining property of an atom. It is a measure of how many hydrogen atoms it can combine with.

For example, oxygen can combine with two hydrogen atoms and create a water molecule. So, the valency of the oxygen atom is two. Methane has one carbon atom combined with four hydrogen atoms to form a methane (${\mathrm{CH}}_4$) molecule.