Consider aiming a beam of free electrons towards free protons. When they scatter, an electron and a proton cannot combine to produce a H-atom,
A. because of energy conservation.
B. without simultaneously releasing energy in the form of radiation.
C. because of momentum conservation.
D. because of angular momentum conservation.
The correct answers are the options (a, b). Due to the law of conservation of energy, a moving electron and a proton cannot collectively form a hydrogen atom as they will simultaneously release energy in the form of radiation.