Bohr's model can be used for hydrogen-like ions-ions that have only one electron, such as He+ and Li2+.
(a) Why is the Bohr model applicable to He+ ions but not to neutral He atoms?
(b) The ground-state energies of H, He+, and Li2+ are tabulated as follows:

By examining these numbers, propose a relationship between the ground-state energy of hydrogen-like systems and the nuclear charge, Z.
(c) Use the relationship you derive in part (b) to predict the ground-state energy of the C5+ ion.

Transcribed Image Text:

Atom Li2+ or ion Ground-state energy He+ -2.18 x 10-18 J -8.72 × 10-18 J -1.96 × 10-17 J