An electron knocked out of a molecule by passing radiation may bind to a neutral hydrogen atom making H-, with one proton and two electrons. In the ground state, will both electrons have the same energy? a) No, because the Pauli exclusion principle forbids two electrons having the same energy. b) Yes, because the Pauli exclusion principle allows a maximum of two electrons with the same energy. c) Yes, but the two electrons must have opposite spin to satisfy the Pauli exclusion principle. d) No, the Pauli exclusion principle makes both energies uncertain, so they cannot be equal.

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An electron knocked out of a molecule by passing radiation may bind to a neutral hydrogen atom making H-, with one proton and two electrons. In the ground state, will both electrons have the same energy?

a) No, because the Pauli exclusion principle forbids two electrons having the same energy.

b) Yes, because the Pauli exclusion principle allows a maximum of two electrons with the same energy.

c) Yes, but the two electrons must have opposite spin to satisfy the Pauli exclusion principle.

d) No, the Pauli exclusion principle makes both energies uncertain, so they cannot be equal.

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