Question

Bohr’s model can explain?

• A. The solar spectrum
• B. The spectrum of hydrogen molecule
• C. Spectrum of an atom or ion containing one electron only
• D. The spectrum of hydrogen atom only

Answer 1

The correct option is C

Spectrum of an atom or ion containing one electron only

The explanation for the correct option

(C) Spectrum of an atom or ion containing one electron only

Bohr's Model

• The orbits, stationary states, or permissible energy levels that the hydrogen atom's electron can follow as it circles the nucleus are defined by its fixed radius and energy.
• These orbits are organized around the nucleus depending on how energetic they are.
• An electron's energy in its orbit does not vary over time.
• The electron travels from a lower energy stationary state to a higher energy state when the necessary amount of energy is absorbed by it or energy is released by it.
• Two important findings that had a significant impact on the development of Bohr's concept of the atom were the dual nature of electromagnetic radiation and atomic spectra.

The spectrum of an atom or ion containing one electron only

• Bohr's model only used hydrogen-like ions.
• For example, ${\mathrm{He}}^{+},{\mathrm{Li}}^{2+}$, and ${\mathrm{Be}}^{3+}$.
• Bohr's model describes the spectrum of an atom or ion with only one electron.
• This model fails to describe the spectra of atoms or ions with two or more electrons.

The explanation for incorrect options

• Bohr’s model can explain the spectrum of an atom or ion containing one electron only.
• Hence all the other options (A), (B) and (D) are incorrect.

Therefore the correct option is (C) Spectrum of an atom or ion containing one electron only.