Question

The elements with atomic numbers $101$ and $104$ belong to, respectively :

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• A. Actinoids and Group $4$
• B. Actinoids and Group $6$
• C. Group $11$ and Group $4$
• D. Group $6$ and Actinoids

Answer 1

The correct option is A Actinoids and Group $4$

$Z=101has[Rn{]}^{86}7s^{2}5f^{13}-\text{actinoids}$

$Z=104has[Rn{]}^{86}7s^{2}5f^{14}6d^2-4^{th}\text{group elements}$

The answer is Actinoids & $4^{th}$ group.
A is the correct option.