The spectrum of `He` is expected to be similar to that of

Options

A. `H`
B. `Na`
C. `Li^(+)`
D. `He^(+)`

Answer

C

Explanation

(c) The spectrum of an atom depends on the number of electrons present in it. Here, helium has two electrons, so the spectrum of `Li^(+)(Z=3)` is similar to that of helium because both He and `Li^(+)` have two electrons.