If r is the radius of the nucleus and A is the atomic weight (mass number), then
Question and options
If r is the radius of the nucleus and A is the atomic weight (mass number), then
- r is proportional to
- r is proportional to
- r is proportional to
- r is inversely proportional to
Answer and explanation
Correct answer: A - r is proportional to \(A^{1/3}\)
Nuclear radius ( about 1.2 fm), since nuclear volume is proportional to mass number. The radius therefore grows with the cube root of the mass number; it does not vary as its square root or fall as A rises.
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