A negative muon, which has a mass nearly 200 times that of an electron, replaces an electron in a Li atom. The lowest ionization energy for the muonic Li atom is approximately:

In the standard chemical symbol representation of an element, AZM, what do A and Z represent respectively?

Which theory did Niels Bohr challenge to explain line spectra of atoms?

According to the Bohr model, the energy of the emitted photon due to a transition from the 3rd excited state to the ground state in a hydrogen atom is: