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Question

90Th232 belongs to group-3. It emits an α-particle. The daughter element belongs to group

A
I group
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B
II group
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C
III group
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D
IV group
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Solution

The correct option is C III group
90Th23288Ra228+2He4; 3 2

Radium belongs to Group-2 (Alkaline eath metals)

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