Question

Ratio of mass of nucleus with mass of atom is approximately

• A. $1$
• B. $10$
• C. $10^3$
• D. $10^{10}$

Answer 1

Answer: (A)

As nearly $99.9\%$ mass of atom is in nucleus.
$\frac{\text{ Mass of nucleus }}{\text{ Mass of atom }}=\frac{99.9}{100}=0.99\approx 1$