In each part, an orbital diagram for an atom is given. Identify the element and whether this is the ground state of the atom. For any excited states, show the orbital diagram for the ground state.

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(a) (b) (c) (d) 1s 11 15 1s 11 15 1 2s 11 25 2s 2s 1 2p 1 1 1 2p 2p 是一 1 1 1 20 3s 12 p 111