The simple Bohr model is not applicable to atom because
A. is an inert gas.
B. has neutrons in the nucleus.
C. has one more electron.
D. electrons are not subject to central forces.
The correct option of the mentioned problem is (c), (d) as,
The famous model of atomic structure proposed by Neil Bohr is only applicable to light atoms j=having only one electron revolving around the nucleus, and it is mostly used for H-atom. The electron must revolve around a nucleus which stationary and positively charged. It is also applicable for - H, He+, Li+2, Na+1 etc.
Because of having only one electron and electrons are not subjected to centripetal forces; thus, it is also applicable for He4.