Question

The binding energy of the second excited state of $L{i}^{2+}$ ion is:

• A. $13.60\text{eV}$
• B. $27.20\text{eV}$
• C. $24.17\text{eV}$
• D. $18.20\text{eV}$

Answer 1

The correct option is A $13.60\text{eV}$

Since we are calculating the binding energy of the second excited state of $L{i}^{2+}$ ion, we need to calculate, $E_3$ to $E_{\infty }$.
$\Delta E_{3to\infty }=E_{\infty }-E_3$
$=0-(-13.6\frac{3^2}{3^2})\text{eV}$
$=13.6\text{eV}$