A p-block element in which the last electron enters an s-orbital of the valence shell instead of a p-orbital is:

JEE Main Chemistry question

A -block element in which the last electron enters an -orbital of the valence shell instead of a -orbital is:

Answer: (D)

Helium, though placed in the -block (Group 18) by modern convention, has the configuration — its last (and only) electrons occupy an

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Question ID VK-133724