## anonymous 5 years ago As an electron in a hydrogen atom moves from the second principal energy level to the first principal energy level, the energy of the atom: 1) decreases 2) increases 3) stays the same

decreases it goes from $-5.445\times10^{-18}J$ in the second level to $-2.178\times10^{-18} J$ in the first level according to Bohrs equation