why do elements He , Ne and Ar have zero valencies
Answers
Answered by
3
Because they are noble gases ..And their octets and duplets are complete..i.e. they can not accomodate anymore electrons in their shells..
jattandaswag:
is this right answer?
Yes it is
In which standard are u in?
If in 10 th then it will be enough
no brother i am in 9
Still it is enough
ok thanks bro
Answered by
1
because they haves full electrons in the outer most shell or valency shell
ex:He=2 electrons in valency shell
so first shell is enough to fill the electrons
the capcity of the shell is 2
If the electrons are more the half of the capacity of the shell
then,
the valency will be the capacity of shell- the number of electrons in the shell
so valency of He = 2-2
= 0
similarly we can find the valencies of Ar ,Ne etc...
if u like mark as brinalest
ex:He=2 electrons in valency shell
so first shell is enough to fill the electrons
the capcity of the shell is 2
If the electrons are more the half of the capacity of the shell
then,
the valency will be the capacity of shell- the number of electrons in the shell
so valency of He = 2-2
= 0
similarly we can find the valencies of Ar ,Ne etc...
if u like mark as brinalest
mark as brinalest ans
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