Atomic Structur...

Which electronic level would allow the hydrogen atom to absorb a photon but not to emit a photon?

Rutherford’s alpha particle scattering experiment eventually led to the conclusion that

Which of the following does not characterize X-rays?

The electrons, identified by quantum numbers n and l, (i) n = 4, l = 1, (ii) n = 4, l = 0,  (iii) n = 3, l = 2 and  (iv) n = 3, l = 1 can be placed in order of increasing energy, from the lowest to highest, as

If the nitrogen atom had electronic configuration 1s⁷, it would have energy lower than that of the normal ground state configuration 1s² 2s² 2p³, because the electrons would be closer to the nucleus, yet 1s⁷ is not observed because it violets

Total number of nodes in 5d sub-shell will be

An electron in H-atom in its ground state absorbs 1.50 times as much as energy as the minimum required for its escape (13.6 eV) from the atom. Thus KE given of emitted electron?

A continuum in spectrum is observed due to the following