Answers

2016-01-11T13:41:20+05:30
2,8,3respectively k l and m shells
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2016-01-11T13:49:51+05:30
given :
atomic number - 13
atomic mass - 27
answer :
k shell - 2 electrons
l shell - 8 electrons
m shell - 3 electrons

hope it's useful and helpful..........
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