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The fundamental state corresponds to the case where all electrons are located as close as possible (and as allowed) to the nucleus. Excited states are states with a different configurations, where at least one electron is further.

The fundamental state is the one for which the energy is minimum. For the excited states, the electrons are more energetic and thus the total energy of the state is larger.

Is it clearer?

Yes sir , it is.

Thank you!

You are very welcome!

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