The period of rotation of electron on the second Bohr orbit is
A)0.608 fs.
B)1.22 fs.
C)3.67 fs.
D)4.53 fs.
E)5.34 fs.

Question

Quizplus · Accepted Answer

The period of rotation of an electron on the nth Bohr orbit is given by T=2π(n²h/μe²), where h is Planck's constant, μ is the reduced mass of the electron and the nucleus, and e is the elementary charge. For the second Bohr orbit (n=2), we have T=2π(2²h/μe²)=1.22 fs. Therefore, the correct answer is B.

The Period of Rotation of Electron on the Second Bohr