an element has an atomic number 12.How many electrons will be present K,L,and M energy shells of its atom?
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dark3
2,8,2 and 2 will valency and element is magnesium
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sanshri2010
Atomic no.12 represents magnesium the configuration of magnesium is 2 , 8 , 2 hence K shell have 2 electron L shell have 8 electron M shell have 2 electron
Answers & Comments
the configuration of magnesium is 2 , 8 , 2
hence
K shell have 2 electron
L shell have 8 electron
M shell have 2 electron