Statement I : Positively charged nucleus of an atom has a radius of almost $10^{-15} \mathrm{~m}$.\

Question

Statement I : Positively charged nucleus of an atom has a radius of almost $10^{-15} \mathrm{~m}$.\ Statement II: Observed atomic mass of the element is the weighted average of atomic masses of the individual isotopes.

Professor PC Thomas Classes · Answer

(a) : Average atomic mass $=\frac{m_1 x_1+m_2 x_2}{x_1+x_2} m_1, m_2$ are the masses of isotopes in sample with $x_1$ and $x_2$ as their relative abundance.