Question

Assertion: Density of all the nuclei is same.
Reason: Radius of nucleus is directely proportional to the cube root of mass number.

• A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
• B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
• C. Assertion is true but Reason is false
• D. Assertion is false but Reason is true

Answer 1

Answer: (A)

Experimentally, it is found that the average radius of a nucleus is given by $R=R_0 A^{1 / 3}$ where $$ R _0=1.1 \times 10^{-15} m =1.1 fm $$ and $A =$ mass number