CHEMISTRY · Single correct · CBSE · Chemistry · Structure of Atom · Structure of Atom
Problem
Under identical experimental conditions, the wavelength of the first Balmer line produced by singly ionised helium (He+) will be
(a) longer than that of hydrogen because the increased reduced mass lowers the energy gap
(b) the same as that of hydrogen because only the principal quantum numbers matter
(c) shorter than that of hydrogen because the nuclear charge is larger
(d) shorter than that of hydrogen by a factor of 2, since the energy levels scale linearly with Z