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1. |
Which orbital in each of the following pairs is lower in energy in a many-electron atom? (a) 2s, 2p (b) 3p, 3d (c) 3s, 4s (d) 4d, 5f |
Answer» (a) `2s lt 2p` (b) `p lt 3d` (c) `3s lt 4s` (d) `4d lt 5f` | |