a b c d |
c |
$\text{Energy required to make a transition from energy state n to m is }$ $\Delta E = -13.6 z^2(\frac{1}{n^2} - \frac{1}{m^2}) $ $\text{Energy required to remove an electron from n=2 is }$ $\Delta E = -13.6 1^2(\frac{1}{2^2} - \frac{1}{\infty^2}) = 3.4 eV$ |