What is Valency?
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The combining capacity of an atom of element.
It is total no. of electrons lose,gain or share by the an atom to attain stable configuration or to fill duplet (2) or octet (8) in its outermost shell is called valency
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Combining capacity of an atom is known as its valency.
The last shell in an atom can only accomodate 8 electrons known as valence electrons.
Eg: Sodium has electrons
2, 8 ,1
1 in last shell and hence has valency 1+
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