Chemistry - Atomic Structure Question with Solution | TestHub

Electromagnetic radiation of wavelength$663 \mathrm{nm}$is just sufficient to ionise the atom of metal$\mathrm{A}$. The ionization energy of metal$\mathrm{A}$in$\mathrm{kJ} {\mathrm{mol}}^{-1}$is ___. (Rounded-off to the nearest integer)$\left[\mathrm{h}=6.63\times {10}^{-34}\mathrm{Js},\mathrm{c}=3.00\times {10}^8 {\mathrm{ms}}^{-1}, {\mathrm{N}}_{\mathrm{A}}=6.02\times {10}^{23} {\mathrm{mol}}^{-1}\right]$