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 $=\frac{\text{ Mass }}{\text{ Volume }}=\frac{mA}{\frac{4}{3}\pi R_0^{3}A}=\frac{3m}{4\pi R_0^3},$
$m=m_p=m_N$
$\approx 2.3\times 10^{17}kg{m}^{-3},$ which is a constant.