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HOW TO FIND VALENCY OF ANY ELEMENT?GIVE EXAMPLE ALSO.ANSWER SOON.

Dear Student,

The valency is defined as the number of electrons gain or lost by an atom.
The electrons present in the last shell determine the valency of a particular element.
If,
Number of valence electrons ≤4: valency = number of valence electrons
Number of valence electrons >4: valency = 8 - number of valence electrons
If you consider the element ‘aluminium’ and try to write its electronic configuration, then it is 2, 8, 3 the valency is equal to 3.
However, for element ‘oxygen’ having electronic configuration 2, 6 the valency is 8 – 6 = 2.
 
Hope it is clear to you.
Cheers!

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View Full Answer

 venency is the combining capacity of an element

no of electrons, in the outermost shell, gained or lost is the velency

an element can gain electron if it is having valence electons more than 4 if less than 4 it gives the electons;

for example-hydrogen has 1valance electron. it gives 1 electron; there4 its velency is 1

& sulphur  has 6 valance electons, there4 it gains 2 electrons to complete its octat; there4 its valency is -2

i think u understnd

plz thums up !!

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