Question

what is the valency and valance electron of argon?

Answer 1

see.... valence electrons means electrons in outermost shell..... so in case of argon, outermost shell is M and it's fully filled.so valence electrons are 8 ......now we know when no of valence electrons exceed 4 then to find valency we use formula...
8 - number of valence electrons...
so it's.
8 - 8
0(zero)

Answer 2

Hey.


Here is your answer.


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Argon (Ar)


Atomic no. - 18


Electronic configuration :

1s2, 2s2 2p6, 3s2 3p6


So it has 2 electrons in K shell, 8 in L shell and 8 in M.


All these shells are completely filled.

Because the third energy level has eight electrons and is therefore full , it is called a NOBAL GAS.


So it have no or very less tendency or ability to loose or gain electrons to complete it's octet which is known as valency.


Also we know that the electrons present in the outer most orbit or shell are called valance electrons so we can say that Ar has 8 valence electrons.



Hence, it's vacancy is Zero(0) and valence electrons are eight (8).


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Thanks