Question

Find the Valency of atoms of Chlorine and Sulphur (no direct answer please)​

Answer 1

Answer:

to find valency

atomic number of Chlorine Cl = 17

that is chlorine has 17 electons

electronic configuration of chlorine

in its first shel(k shel) it has 2 electons, in its next shel(L shel) it have 8 electrons and in the last shel it have 7 electrons.

to attain stability chlorine need to have 8 electrons in the last shel.

chlorine need to borrow a extra electon(e-) in its last shel.

so valency of chlorine is -1

(why -1_ An atom is always neutral when it takes a electron which is negatively charged the charge of the atome will be negative)

atomic number of sulphur is 16.

the elctonic configuration of sulphur is 2-8-6

sulphur need two more elctons in it last shel

when it takes two shells sulphus will become  $S^{-2}$

valency of sulphusr is (-2)