# Bohr Model

Hi; I got a question related to Bohr's model but I'm not sure how to interpret the equations given what I know. Here's the question, sorry if it's a long read:

The Bohr model correctly predicts the main energy levels not only for atomic hydrogen but also for other "one-electron" atoms where all but one of the atomic electrons has been removed, such as in He+ (one electron removed) or Li++ (two electrons removed).

(a) The negative muon (–) behaves like a heavy electron, with the same charge as the electron but with a mass 207 times as large as the electron mass. As a moving muon– comes to rest in matter, it tends to knock electrons out of atoms and settle down onto a nucleus to form a "one-muon" atom. For a system consisting of a lead nucleus (Pb208 has 82 protons and 126 neutrons) and just one negative muon, predict the energy (in electron volts) of a photon emitted in a transition from the first excited state to the ground state. The high-energy photons emitted by transitions between energy levels in such "muonic atoms" are easily observed in experiments with muons.

(c) Calculate the radius of the smallest Bohr orbit for a – bound to a lead nucleus (Pb208 has 82 protons and 126 neutrons). Compare with the approximate radius of the lead nucleus (remember that the radius of a proton or neutron is about 10–15 m, and the nucleons are packed closely together in the nucleus).

Appreciate any help =]

OlderDan