Question

Which of the following was NOT a problem with the Bohr model of the atom?

Group of answer choices

a.It did not explain the shapes observed in molecular bonding.

b.It predicted a magnetic moment, which is not observed.

c.It did not explain the observed absorption spectrum of hydrogen.

d.It predicted EM emission via cyclotron radiation, which is not observed.

e.It did not explain why the electron orbits are stable, versus spiraling into the nucleus.

Answer 1

Option (e) is right

According to the classical physics, an electron in orbit around an atomic nucleus should emit EM radiation continuously because it is continually accelerating in a curved path. The resulting loss of energy implies that the elections should spiral into the nucleus in a very short time.

But Bohr proposed that elections are restricted to a certain fixed(quantised) orbits. An election can jump suddenly between these orbits by absorbing or emitting a photon with the appropriate precise wavelength.