Answers

2014-01-29T12:28:20+05:30
IN KERNEL, NUCLEUS AND ELECTRON ARE IN INNER ORBIT WHILE 8 ELECTRON CAN BE ACCOMODATED IN OUTER SHELL.
IT IS AN OCTATE WHICH HAVE 8 SIDE AND SO 8 ELECTRON OF OUTER MOST ORBIT CAN BE ARRANGED
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2014-01-29T20:07:58+05:30
In chemistry, atom of metal is consists of 2 parts: valence and kernel.
Valence consists of valence electrons, whereas kernel parts consists of nucleus and electrons except valence electrons. 
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