Bohr’s second postulate of the atomic model is related with quantization of:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Angular Momentum
Bohr’s second postulate says that the electron can revolve only in those orbits for which its angular momentum is an integral multiple of \( h/2\pi \).
\( \displaystyle L = mvr = \frac{nh}{2\pi},\quad n = 1, 2, 3, \ldots \)
NCERT (2026-27):
Bohr Model of the Hydrogen Atom – “… Bohr’s second postulate defines these stable orbits. This postulate states that the electron revolves around the nucleus only in those orbits for which the angular momentum is some integral multiple of \( h/2\pi \) where \( h \) is the Planck’s constant (\( = 6.6\times10^{-34}\,\mathrm{J\,s} \)). Thus the angular momentum (\( L \)) of the orbiting electron is quantised. That is
\( \displaystyle L = nh/2\pi \qquad (12.5) \)”