Asked by gine

The first ionization energy of a hydrogen atom is 2.18 aJ. Assuming the ionization efficiency is 82%, how many such photons are needed to 1.00 * 10^16 atoms?
Answered by DrBob222
Is that 2.18 J/atom?
2.18/0.82 = 2.66 J/atom required.
2.66 x 1E16 = ?