Answers

2016-03-21T14:22:37+05:30
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
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2016-03-21T14:25:05+05:30
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  
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