Question
According to Bohr hypothesis, discrete quantity is:

Answer

  1. Angular momentum
Explanation:
Bohr's hypothesis
Electrons revolves round the nucleus in water orbits.
Orbit of the electron around the nucleus can take only some special values of radius.
The energy of the atom as a definite value in these orbits.
In this Orbits, Angular momentum (e) of the electron is integral multiple of the plank's constant h divided by 2n
$\text{i.e. l}=\text{n}\frac{\text{h}}{2\text{n}}.$

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