Question

In Bohr's atomic model, an electron jumps from $n=1$ to $n=3$, how much energy will be absorbed?

Answer 1

When an electron jumps from from one orbitals to another orbital the energy absorbed or released is given by,

$h\nu =E_{n_3}-E_{n_1}$

Now, $E_n=\frac{-13.6}{n^2}eV$

$E_{n_1}=-13.6eV$ and $E_{n_3}=-1.5eV$

Therefore, $h\nu =12.1eV$

Hence, $12.1eV$ amount of energy is absorbed during transition from first orbitals in third orbital.