Answers

2015-12-16T16:57:05+05:30
In 1st orbit-- 2n^2 =    2
In 2nd orbit--2n^2 =   8
In 3rd orbit -- 2n^2 = 18
                              ---------
                                  28
1 5 1
but practically only 18 are possible
2015-12-16T18:37:49+05:30
The maximum of holding elctrons is 18 according to elctron configuration
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