Ionisation energy of hydrogen is

What is the ionisation energy of hydrogen in eV?

Ionisation energy of hydrogen atom is 13.6eV.Calculate the ionisation energy for Be^(3+) in the first excited sate.

Ionisation energy of hydrogen atom is 13.6 eV. Then the energy required to ionise a hydrogen atom in which the electron is in the second orbit from the nucleus is (eV)

Calculate the wavelength of photon which will be emitted when the electron of hydrogen atom jumps from fourth shell to the first shell. Ionisation energy of hydrogen atom is 1.312xx10^(3)hJ "mol"^(-1) .

A doubly ionised lithium atom is hydrogen like with atomic number Z = 3 . The wavelength of radiation required to excite the electron in Li^(2+) from first to third Bohr orbit will be ______ . (Ionisation energy of hydrogen atom is 13.6 eV)

What is the ionisation energy of hydrogen atom?

If first ionisation energy of hydrogen be E , then the ionisation energy of He^+ would be :