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Question

When 22688Ra emits an α-particle, the new element formed belongs to:

A
third group
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B
zero group
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C
fourth group
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D
second group
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Solution

The correct option is B zero group
When α particle is emitted, the new element has atomic number 2 less than original element. Thus atomic number of product is 882=86.86 is atomic number of Radon (Rn) which is inert gas and hence belongs to 0th(18th) group.

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