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The number of a-particles emitted by ""^...

The number of a-particles emitted by `""^(218)Ra` in changing to stable isotope `""^(206)Pb` is :

A

3

B

4

C

6

D

2

Text Solution

Verified by Experts

The correct Answer is:
A
`_(84)^(218)Rato_(82)^(206)Pb++x""_(2)^(4)He+y""_(-1)overset(0)e`
Comparing mass numbers
`218=206+4x+0`
4x=12 or x=3
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MODERN PUBLICATION-NUCLEAR CHEMISTRY-Multiple Choice Questions
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