Give reasons why in hcl the valency of the element chlorine is conside

1.	Give reasons why in hcl the valency of the element chlorine is considered as one
Answer» Chlorine has 7 electrons in its outermost shell. So, to attain stable "octet configuration", which means 8 electrons in the outermost shell; chlorine has to gain 1 electron. After gaining 1 electron, CHLORIDE ion is formed which is DENOTED by Cl⁻ Since it gains 1 electron to attain stable configuration, its VALENCY becomes 1 In GENERAL, Valency = Number of valence electrons ( if valence electrons ≤ 4) Valency = 8 - Number of valence electrons ( if Valence electrons > 4) NOTE: (though you might KNOW it already) Valence electrons is the number of electrons in the outermost shell. Hope it helps!!

Give reasons why in hcl the valency of the element chlorine is considered as one

Answer»

Chlorine has 7 electrons in its outermost shell.

So, to attain stable "octet configuration", which means 8 electrons in the outermost shell; chlorine has to gain 1 electron.

After gaining 1 electron, CHLORIDE ion is formed which is DENOTED by Cl⁻

Since it gains 1 electron to attain stable configuration, its VALENCY becomes 1

Valency = Number of valence electrons ( if valence electrons ≤ 4)

Valency = 8 - Number of valence electrons ( if Valence electrons > 4)

NOTE: (though you might KNOW it already)

Valence electrons is the number of electrons in the outermost shell.

Hope it helps!!