Ncert Exercises & Solutions

The simple Bohr model is not applicable to \(\text{He}^4\) atom because:

(a)	\(\text{He}^4\) is an inert gas.
(b)	\(\text{He}^4\) has neutrons in the nucleus.
(c)	\(\text{He}^4\) has one more electron.
(d)	electrons are not subject to central forces.

Choose the correct option:

1. (a), (c)
2. (a), (c), (d)
3. (b), (d)
4. (c), (d)

(4) Hint: The Bohr model is only applicable to the Hilike atoms.

The simple Bohr model is not applicable to He⁴ atom because He⁴ has one more electron and electrons are not subject to central forces.