Atomic Physics

$15 \mathrm{eV}$ is given to $e^{-}$in $4^{\text {th }}$ orbit, then find its final energy when it comes out of $\mathrm{H}$-atom.

The largest wavelength in the ultraviolet region of the hydrogen spectrum is $122 \mathrm{~nm}$. The smallest wavelength in the infrared region of the hydrogen spectrum (to the nearest integer) is

In a hydrogen like atom electron makes transition from an energy level with quantum number $n$ to another with quantum number $(n-1)$. If $n>>1$, the frequency of radiation emitted is proportional to

In hydrogen atom, electron excites from ground state to higher energy state and its orbital velocity is reduced to $\left(\frac{1}{3}\right)^{\mathrm{rd}}$ of its initial value. The radius of the orbit in the ground…

Ionisation potential of hydrogen atom is $13.6 \mathrm{~V}$. Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy $12.1 \mathrm{eV}$. The spectral lines emitted by hydrogen atoms…

Total energy of an electron in hydrogen atoms above $0 \mathrm{eV}$ leads to

A triply ionized beryllium $\left(\mathrm{Be}^{3+}\right)$ has the same orbital radius as the ground state of hydrogen. Then the quantum state $n$ of $\mathrm{Be}^{3+}$ is

If the wavelength of $1^{\text {st }}$ line of Balmer series of hydrogen is $6561 Å$, the wavelength of the $2^{\text {nd }}$ line of series will be

Assertion: Total energy of electron in an hydrogen atom is negative.Reason : It is bounded to the nucleus.

Assertion : Bohr's atomic model cannot be used to explain multiple electron species.Reason: It does not take inter-electronic interactions in account.

Total energy of the electron in hydrogen atom above $0 \mathrm{eV}$ leads to

The series corresponding to minimum wavelength transition in $\mathrm{H}$-atom