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Question

The element with atomic number 84 and mass number 218 change to other element with atomic number 84 and mass number 214. The number of α and β -particles emitted are respectively:

A
1, 3
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B
1, 4
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C
1, 2
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D
1, 5
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Solution

The correct option is D 1, 2
84X21884Y214+x+2α4+y1β0

no. of α-particle = 2182144=44=1

no. of β-particle = 8484+2×1=2.

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