Question

explain valency in term of hydrogen chlorine and oxygen atoms

Answer 1

Hi, my friend.
Here is your answer.

Valency is defined as number of valence electrons required to complete there octet to gain stability.
Example - Nitrogen have atomic number 7
Therefore, N required only 8-5=3 electrons to get stable.

Hydrogen have atomic number 1.
Therefore, H have valency 1.

Chlorine have atomic number 17 (2,8,7)
Therefore, valency is 8-7=1

Oxygen have atomic number 8(2,6)
Therefore, valency is 8-6= 2

Hope it will help you my friend...............

Answer 2

hydrogen atomic number is 1
electrons is equal to atomic number
thwe capacity of k , l,m , n ,are 2,8,8,8
its electron distributionn is 1,-,-,-
to become stable it need1 electron and it can lose one electon
therefore its valency is 1
similarly the valency of chlorine is -1
and oxygen valency is -2