The approximate radius of polonium 210 nucleus in microns is :
A
18.3×10−13m
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B
4.15×10−13m
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C
6.63×10−13m
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D
8.3×10−13m
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Solution
The correct option is B8.3×10−13m The approximate radius of polonium 210 nucleus is 8.3 m. The size of the nucleus can be calculated from the expression r=(1.4×10−13)A1/3m=(1.4×10−13)×2101/3=1.4×10−13×5.94=8.3×10−13m.