Which is not a s- block element ?

1.	Which is not a s- block element ?
Answer» `[Ar]4s^(2)3d^(10)4p^(6)5s^(1)` `1s^(2)2S^(2)2p^(1)` `[He]2s^(2)2p^(6)3s^(1)` 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 outmost shell according to AUFBAU RULE, the element of optin `(b)` belongs to p-block.

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