a) electrons revolve around the nucleus in a circular path (orbit)
b) an electron can occupy an orbit if energy it has and the energy of the orbits are the same
c) an electron can move from one orbit to another by gaining or losing energy. when an electron gain energy it gets excited and jumps from a lower energy to a high energy levels.
d) energy changes can only occur from one energy level to another energy levels and dont occur between levels.
joseph kieti answered the question on November 16, 2017 at 14:17
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