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The no. of valence electrons of an atom is known as its valence it cannot be morethan 8 and if it is more than 4 it is subtracted from 8.
1 4 1
thank u for helping me :-) friends
mark mine as best plzzzzzzzzzz
welcome domy\
You can find the valency by its electronic configuration...

for example electronic configuration of lithium is 2,1 so its valency is 1 as it looses his  1 electron  
0 0 0
the questioner can only mark it as best!!!
ohh thanks
and if the answer is marked as best then that answer will get extra points
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