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Q.

The elements with atomic numbers 101 and 104 belong to. respectively

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a

Actinoids and Group 4

b

Group 11 and Group 4

c

Group 6 and Actinoids

d

Actinoids and Group 6

answer is A.

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Detailed Solution

89AC⟶103LrBelongs to actinoids series and they all belongs to 3rd' group. So atomic no. 101 element is actinoids and atomic number 104 element belongs to 4thgroup.
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