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A nuclide of ...

Question

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

A

Group 14

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B

Group 16

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C

Group 4

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D

Group 6

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Solution

The correct option is B Group 14
After 3 - alpha decay atomic number decreases by 6. Parent atom was in the 2nd group so the daughter will belong to the 14th group since the atomic number decreases by 6.

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