Question
Thu March 17, 2011 By: Rajeev Kumar

If the ouitermost shell of an atom can have maximum of 8 electrons,then how 4th period of modern periodic table have 18 elements?

Expert Reply
Thu March 17, 2011
In the 4th period the no of subshell are 3 (s,p,d ) so it can contain 18 electrons.
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