Question

Molecular formula of methane by crisscross method

Answer 1

C=4valency

H=1valency

C — H

4 — 1

by criss cross method

Answer 2

Explanation:

Atomic number of carbon is 14 and its electronic distribution is 2, 8, 4. This means that one carbon atom has 4 valence electrons. And, in order to attain stability carbon needs to gain 4 more electrons.

And, atomic number of hydrogen is 1 and it contains only 1 electron in its shell. So, in order to attain stability it needs to gain one more electron.

Hence, when carbon atom chemically combines with a hydrogen atom then 4 hydrogen atoms need to combine with one carbon atom.

Therefore, the compound formed is $CH_{4}$ and it is known as methane.

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