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Electron configurations of the group 3 elements
Z Element Electron configuration
21 scandium 2, 8, 9, 2
[Ar]3d14s2
39 yttrium 2, 8, 18, 9, 2
[Kr]4d15s2
71 lutetium 2, 8, 18, 32, 9, 2
[Xe]4f145d16s2
103 lawrencium 2, 8, 18, 32, 32, 8, 3
[Rn]5f146d07s27p1

More tabular

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  • To consider: color font red when electron is irregular (wrt Aufbau?).
  • Is there a convention to mark "completed"? (in the big table below, we use grey font; nice).
Electron configurations of the group 3 elements
Z Element PQR QYZ
21 Sc, scandium 2, 8,  9,  2 [Ar] 3d1  4s2
39 Y, yttrium 2, 8, 18,  9,  2 [Kr] 4d1  5s2
71 Lu, lutetium 2, 8, 18, 32,  9, 2 [Xe] 4f14 5d1 6s2
103 Lr, lawrencium 2, 8, 18, 32, 32, 8, 3 [Rn] 5f14 6d0 7s2 7p1

Table

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