Science, asked by wwwjitarani, 11 months ago

any rule by which we can calculate the valency of any element?????

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Answered by kridhay
2

Answer:

Octave rule is used to find the valency of an element.

Answered by silentperson
1

Answer:

heya mate !!

we can find valency by the outermost shell

as we know here are 4 shells K L M N and like Na electronic configuration is 2,8,1 here M is outermost shell it contains 1 electron extra so its valency is 1

like Cl electronic configuration is 2,8,7 here we will minus from 8 8-7=1 so valency is 1

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