Chemistry

Problem

In a doubly ionised lithium atom (

\text{Li}^{2+}

), an electron initially in the

n=3

orbit emits a photon of wavelength

73.0\,\text{nm}

. Determine the principal quantum number of the final orbit of the electron. Use

h c = 1240\,\text{eV}\,\text{nm}

and assume the Bohr model is applicable.