Energy transfer through atoms collisions

By | July 12, 2018

When a collision between atoms occur like in heat conduction between two gases, does the energy transferred cause an electron to move to a higher energy excitation state, or does it just increase the kinetic energy of the atom (i.e. its temperature) or both?

For example let’s say that atom A has higher kinetic energy than atom B, and that atom B needs 10 or 20 units of energy to get to more excited levels. If the collision between A and B gives 15 units of energy to atom B, how much of that energy goes to get an electron of atom B to a higher energy level and how much goes to increasing the kinetic energy of atom B (i.e. increasing its temperature)? Also what about atom A, it lost 15 units of energy does that only go to reduce its kinetic energy (i.e. its temperature) or does it also allow electrons in atom A to go to a lower excitation level.