Which scientist first proposed that the electron in the hydrogen atom can have only certain energies?
A) Planck
B) Einstein
C) Bohr
D) Rydberg
E) Heisenberg
Answer: C
Which scientist first proposed that the electron in the hydrogen atom can have only certain energies?
A) Planck
B) Einstein
C) Bohr
D) Rydberg
E) Heisenberg