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Questions asked by users might not always be phrased in the clearest way.
The ground state energy is the lowest possible energy level that an atom, molecule, or other system can occupy. It is the state where the system is most stable. Here's an example:
For a hydrogen atom, the ground state energy corresponds to the electron occupying the 1s orbital, which is the lowest energy orbital. The energy of this state is -13.6 eV, a negative value signifying that energy is required to remove the electron from this state.