NEET Physics Atoms MCQs

An electron in a hydrogen atom transitions from an unknown energy level $n_i$ to $n_f = 2$. If the emitted photon has a wavelength of 486 nm, what is the value of $n_i$? (Rydberg constant, R = $1.097 imes 10^7 m^{-1}$)

Which of the following statements is INCORRECT regarding the absorption spectrum of hydrogen?

(A) It consists of dark lines against a continuous background.

(B) The lines correspond to photons absorbed by the electron transitioning to higher energy levels.

(C) The wavelengths of the absorbed photons are identical to the wavelengths of the emitted photons in the emission spectrum.

(D) The absorption spectrum can be used to identify the presence of hydrogen in a sample.

The ratio of the wavelengths of the first line of the Lyman series and the first line of the Balmer series in the hydrogen spectrum is:

A singly ionized Helium atom emits a photon of wavelength 164 nm. If the final state of the electron is n=3, what was the initial state?

The limiting line in the Balmer series of hydrogen corresponds to a transition from $n = \infty$ to $n = 2$. What is the wavelength of this line? (Rydberg constant, $R = 1.097 imes 10^7 m^{-1}$)

In the spectrum of a hydrogen-like species, the wavelength of the first line of the Lyman series is $\lambda$. What is the wavelength of the first line of the Balmer series for this species?

Which of the following is NOT a characteristic of line spectra of atoms?

The lines in the atomic spectrum of hydrogen are due to:

What does the presence of discrete lines in an atomic spectrum indicate about the energy levels of electrons in an atom?

When an electron in a hydrogen atom jumps from n=4 to n=2, the radiation emitted belongs to which series?