Question

The ionization energy of $Li^{2+}$ is equal to

• A. $9\,hcR$
• B. $2\,hcR$
• C. $6\,hcR$
• D. $hcR$

Answer 1

Answer: (A)

$9\,hcR$

Answer 2

Ionization energy $=R ch Z^{2}$
$Z=3$ for $Li ^{2+}$
$\therefore$ Ionization energy $=(3)^{2} R c h=9 R c h$