A gas of hydrogen - like atoms can absorb radiations of `698 eV`. Consequently , the atoms emit radiation of only three different wavelengths . All the wavelengthsare equal to or smaller than that of the absorbed photon.
a Determine the initial state of the gas atoms.
b Identify the gas atoms
c Find the minimum wavelength of the emitted radiation ,
d Find the ionization energy and the respective wavelength for the gas atoms.

Answer

(a) `2` , (b) `Z = 6`
(c) `lambda_("min") = 28.5 Å` , (d) `489.6 eV`