Q. Who among the following was proposed that electrons are distributed in different shells with discrete energy around the nucleus?

[A] Neils Bohr

[B] J. Chadwick

[C] J.J. Thomson

[D] E.Goldstein

Answer: A
Notes:

Explanation: Neils Bohr’s model of the atom was more successful. He proposed that electrons are distributed in different shells with discrete energy around the nucleus. If the atomic shells are complete, then the atom will be stable and less reactive.

Source: Science NCERT