Question

Density of a nucleus is

• A. more for lighter elements and less for heavier elements
• B. more for heavier elements and less for lighter elements
• C. very less compared to ordinary matter
• D. a constant

Answer 1

Answer: (D)

Density $=\frac{\text { Mass }}{\text { Volume }}=\frac{m A}{\frac{4}{3} \pi R_{0}^{3} A}=\frac{3 m}{4 \pi R_{0}^{3}},$
$m=m_{p}=m_{N}$
$\approx 2.3 \times 10^{17} kgm ^{-3},$ which is a constant.