List of top Physics Questions on Atoms and Nuclei asked in JEE Main

Assuming the experimental mass of $ {}^{12}_{6}\text{C} $ as 12 u, the mass defect of $ {}^{12}_{6}\text{C} $ atom is____MeV/$ c^2 $.
(Mass of proton = 1.00727 u, mass of neutron = 1.00866 u, 1 u = 931.5 MeV/$ c^2 $)

In the hydrogen atom, the electron makes a transition from the higher orbit ($i$) to a lower orbit ($f$). The ratio of the radius of the orbits in given by $r_i : r_f = 16 : 4$. The wavelength of photon emitted due to this transition is _________ nm. (Given Rydberg constant $= 1.097 \times 10^7 \text{ /m}$)

The binding energy per nucleon of $^{209} \text{Bi}$ is _______ MeV. \[ \text{Take } m(^{209} \text{Bi}) = 208.98038 \, \text{u}, \, m_p = 1.007825 \, \text{u}, \, m_n = 1.008665 \, \text{u}, \, 1 \, \text{u} = 931 \, \text{MeV}/c^2. \]

Angular momentum of an electron in a hydrogen atom is $ \dfrac{3h}{\pi} $. Then the energy of the electron is ____ eV.

A monochromatic light is incident on a hydrogen sample in ground state. Hydrogen atoms absorb a fraction of light and subsequently emit radiation of six different wavelengths. The frequency of incident light is $ x \times 10^{15} \, \text{Hz} $. The value of $ x $ is_______