s-Block ElementsHard
Question
Which is not s-block element ?
Options
A.[Ar]4s23d104p6 5s1
B.1s2 2s22p1
C.[He] 2s22p63s1
D.None of these
Solution
The block of an element depends on the type of sub-shell which receives the last electron. As last electron enters in p-subshell of outer most shell according to Aufbau rule, the element of option (B) belongs to p-block.
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