Question

exam 2: periodicity & electron configuration/em spectrum
which of the following is true for atoms?
energy is released when electrons in atoms move from the ground state to the excited state.
energy is absorbed in order for an electron to move from the ground state to the excited state.
energy is not gained or lost by atoms.
energy is absorbed in order for an electron to move from the excited state to the ground state.

Explanation:

Electrons in an atom need to absorb energy to move from the lower - energy ground state to the higher - energy excited state. When electrons move from the excited state to the ground state, energy is released. Atoms can gain or lose energy through electron transitions.

Answer:

Energy is absorbed in order for an electron to move from the ground state to the excited state.