Question

The ionisation energy of 10 times ionized sodium atom is

• A. $\frac{13.6}{11}eV$
• B. $\frac{13.6}{112}eV$
• C. $13.6\times (11{)}^{2}eV$
• D. $13.6eV$

Answer 1

The correct option is C $13.6\times (11{)}^{2}eV$

$N{a}^{+10}$
$I.E.=13\cdot 6\times \frac{2^2}{n^2}$
$z=11,n=1$
$\therefore IE=13\cdot 6\times (11{)}_{ev}^2$