Question

4. An atom emits a photon with a wavelength of 872 nm when its electron moves from the n = 5 energy level to the n = 4 energy level. From this fact, what can you can conclude? (Hint: drawing a diagram may be helpful) (A) This atom must emit lower energy light than the 872 nm light when moving from the n= 5 energy level to the n= 1 energy level (B) This atom's electron can transition from the n = 4 level to the n=5 level by absorbing any light with a wavelength's less than 872 nm ( <872 nm). (C) This atom's electron can only transition from the n=4 level to the n-5 level by absorbing light with a wavelength of 872 nm (and no other wavelengths). (D) The transition from n=5 to n = 4 is called excitation.

Answer 1

(c) this atom's electron can only transition from the n=4 level to the n=5 level by absorbing light with a wavelength of 872 nm and no other wavelengths.

Reason : According to Bohr atomic model, energuy levels are quantised meaning only specific energy can excite electrons to higher staes. In this case it is a ohoton with wavelength 872 nm