please tell me how to find or how to calculate the valancy of an element
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to calculate valency
write the atomic no in K L M form
example Na atomic no 11
the K= 2 L= 8 M= 1
therefore M have 1 electron so it's valency is 1
same in case of sulphur atomic no 16
K= 2 L=8 M= 6
therefore 8-6= 2 nd valency is 2
if no is greater than 4 then it's should minus from 8
write the atomic no in K L M form
example Na atomic no 11
the K= 2 L= 8 M= 1
therefore M have 1 electron so it's valency is 1
same in case of sulphur atomic no 16
K= 2 L=8 M= 6
therefore 8-6= 2 nd valency is 2
if no is greater than 4 then it's should minus from 8
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