Question

If each hydrogen atom in the ground state of $1.0$ mol of $H-$atoms is excited by absorbing photons of energy $8.4$ eV, $12.09$ eV and $15.0$ eV of energy, then the number of spectral lines emitted is equal to:

Answer 1

Is dated hydrogen atom can absorbing of the

touching photons of energy, given by the

eqn

$E=13.6(1-\frac{1}{n^2})eV$

taking $n=3$

$E\approx 12.8\left(or\right)12.1eV$

These, it can absorb $12.1eV$