Answers

2015-06-10T19:51:17+05:30
Since valency is the nuber of atoms a compound requires it thus chooses the appropriate element and charge.

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Sorry Aryan what is meant by nuber in your answer
2015-06-11T07:34:09+05:30
Valency is the no.of outermost electrons which take part in forming the bond.
When two atoms approach each other and react with each other, it is their outer shells that come into contact first, and it is therefore the electrons in their outer shells that are normally involved in any chemical reaction.
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