Atoms and Nuclei

Muon ($\mu$^$-$) is a negatively charged (|q| = |e|) particle with a mass m_$\mu$ = 200 m_e, where m_e is the mass of the electron and e is the electronic charge. If $\mu$^$-$ is bond to a proton to form a hydrogen like atom, identify the correct statements. (A)   Radis of the muonic orbit is 200 times smaller than that of the electron. (B)   The speed of the $\mu$^$-$ in the n^th orbit is ${1 \over {200}}$ times that of the electron in the n^th orbit. (C)   The ionization energy of muonic atom is 200 timesmore than of an hydroen atom. (D)   The momentum of the muon in the n^th orbit is 200 times more than that of the electron.