Atoms And Nuclei Mock Tests

The mass of a nucleus with mass number A = 100 is 99.9075 u. If the mass of a proton is 1.0078 u and the mass of a neutron is 1.0087 u, the binding energy per nucleon is approximately: (1 u = 931.5 MeV/c²)

A nucleus at rest undergoes radioactive decay. The ratio of the kinetic energies of the daughter nucleus and the emitted alpha particle is:

In the Bohr model of the hydrogen atom, the electron transitions from the n = 3 energy level to the n = 1 level. The wavelength of the emitted photon is: (R_H = 1.097 × 10⁷ m⁻¹)

In the Bohr model of the hydrogen atom, the electron transitions from the n = 3 energy level to the n = 1 level. The wavelength of the emitted photon is: (Rydberg constant R = 1.097 × 10⁷ m⁻¹)

In a nuclear reaction, 0.1 amu of mass is converted to energy. The energy released is approximately:

A nuclear reactor is said to be critical when:

The wavelength of the first line of the Balmer series of hydrogen is 656 nm. The wavelength of the second line is approximately: (Hα = 656 nm, Hβ = ?)

The half-life of a radioactive substance is 30 days. The time taken for 3/4 of the original amount to decay is: