When an electron moves from the n = 1 to the n = 3 orbit:
A) the radius doubles and the angular momentum increases by a factor of 9.
B) the radius increases by a factor of 9,and the angular momentum triples.
C) both the radius and the angular momentum increase by a factor of 9.
D) both the radius and the angular momentum triple.

Question

Quizplus · Accepted Answer

According to Bohr's model, the radius of the electron orbit is proportional to n^2, so as the electron moves from n=1 to n=3, the radius of the orbit increases by a factor of (3^2)/(1^2) = 9. The angular momentum of the electron is given by L = n(ħ/2π), so as n increases from 1 to 3, the angular momentum triples (L3/L1 = 3(3/2)/1/2 = 9). Therefore, choice B is the correct option.

When an Electron Moves from the N = 1 to the N