List of top Physics Questions on Atoms asked in NEET (UG)

The spectral series which corresponds to the electronic transition from the levels n₂ = 5, 6,… to the level n₁ = 4 is

Polar molecules are the molecules:

Polar molecules are the molecules :

For which one of the following, Bohr model is not valid?

The number of protons, neutrons and electrons in $^{175}_{71} Lu,$ respectively , are :

The total energy of an electron in the $n^{th}$ stationary orbit of the hydrogen atom can be obtained by

The ground state energy of hydrogen atom is -13.6 eV. When its electron is in the first excited state, its excitation energy is

Ionization potential of hydrogen atom is 13.6 eV. Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy 12.1 eV. According to Bohr's theory, the spectral lines emitted by hydrogen will be :

In a discharge tube ionization of enclosed gas is produced due to collisions between :

Energy levels A,B and C of a certain atom correspond to increasing values of energy i.e., E_A<E_B<E_C. If \(\lambda_1,\lambda_2\) and \(\lambda_3\) are wavelengths of radiations corresponding to transitions C to B,B to A and C to A respectively, which of the following relations is correct ?

The total energy of an electron in the first excited state of hydrogen is about -3.4eV. Its kinetic energy in this state is:

J.J. Thomson's cathode-ray tube experiment demonstrated that

The volume occupied by an atom is greater than the volume of the nucleus by a factor of about

For the given reaction, the particle \(\text {X}\) is:
\(_6C^{11}→\ _5B^{11}+β^++X\)

The atomic number of silicon is 14. Its ground state electron configuration is