Answers

2016-03-25T07:34:11+05:30
According to what I studied argon has perfectly filled outermost shell Helium and neon also have complete outermost shell Argon electronic configuration: 2,8,8 , k,l,m shells Helium:2 k shell Neon : 2,8 k and L shell
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2016-03-25T08:52:41+05:30
Helium,neon,and argon are those elements which completely filled the outer most shell. helium-He(2) ,neon-Ne (2,8),argon-Ar (2,8,8) .they are nobel gases ..
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