The simple Bohr modle is not applicable to `He^(4)` atom because

Options

A. `He^(4)` is an inert gas
B. `He^(4)` has neutrons in the nucleus
C. `He^(4)` has one more electrons
D. electrons are not subjected to central forces

Answer

C, D

Explanation

`._(2)He^(4)` atom has two electrons. Simple Bohr model applies only to one electron atoms (H-atom). It does not apply to `He^(4)` because it posseses one more electron. Further, these electrons are not subjected to central forces. Choices (c) and (d) are correct.