Odpowiedź:
4Be: 1s² 2s²
15P: [Ne] 3s² 3p³
8O2-: 1s²,2s²,2p⁶
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Odpowiedź:
4Be: 1s² 2s²
15P: [Ne] 3s² 3p³
8O2-: 1s²,2s²,2p⁶