The energy (in $eV$) associated with the electron in the $1^{st}$ orbit of $Li^{2+}$ is

Typical electronic energy gaps in molecules are about $1.0 \ eV$. In terms of temperature,the gap is closest to

Calculate the radius of the first orbit of $Be^{3+}$. (in $pm$)

In which transition is one quantum of energy emitted?

In a $H$ atom,if the angular momentum of an electron is $3.164 \times 10^{-34} \ kg \ m^2 \ s^{-1}$,what is the energy of the electron in that orbit in $eV$?

The ionization energy of an electron in an excited state of a hydrogen atom is $+0.85 \, eV$. What will be the energy of the emitted photon in $eV$ when it returns to the ground state?