Class XII Physics Atoms 2

The value of angular momentum for He⁺ ion in the first Bohr orbit is:

What is the wavelength of the radiation emitted when the electron in a H-atom jumps from n = ∞ to n = 2?

Find the binding energy of a H-atom in the state n = 2 –

The energy levels of a certain atom for 1st, 2nd and 3rd levels are E, 4E/3 and 2E respectively. A photon of wavelength λ is emitted for a transition 3 → 1. What will be the wavelength of emission for transition 2 → 1

If n >> 1, then the dependence of frequency of a photon, emitted as a result of transition of electron from n^th orbit to (n–1)th orbit, on n will be-

In which of the following transitions will the wavelength be minimum?

If the wavelength of photon emitted due to transition of electron from third orbit to first orbit in a hydrogen atom is λ, then the wavelength of photon emitted due to transition of electron from fourth orbit to second orbit will be -

In hydrogen atom H_α - line arises due to transition n = 3 →n = 2. In the spectrum of singly ionised helium there is a line having the same wavelength as the H_α line. This is due to the transition -