Nuclei - Result Question 5

5. The radius of germanium (Ge) nuclide is measured to be twice the radius of 49Be. The number of nucleons in Ge are

[2006]

(a) 74

(b) 75

(c) 72

(d) 73

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Answer:

Correct Answer: 5. (c)

Solution:

  1. (c) We use the formula,

R=R0A1/3

This represents relation between atomic mass and radius of the nucleus.

For berillium,

For germanium, R2=R0A1/3

R1R2=(9)1/3(A)1/312=(9)1/3(A)1/3

18=9AA=8×9=72.



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