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A nuclide of an alkaline earth metal undergoes radioactive decay by emission of the α-particle in succession. The group of the periodic table to which the resulting daughter element would belong is:

1. Gr. 4
2. Gr. 6
3. Gr. 14
4. Gr. 16

Correct answer: Gr. 6

Solution

An alkaline earth metal belongs to Group 2. Emission of an α-particle reduces the atomic number by 2, moving the element to Group 16 in the periodic table.

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