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typeracer

Pit Stop
Racer Keelan (keelann)
Race Number 27
Date Thu, 21 Sep 2017 14:24:00
Speed 141 WPM Try to beat?
Accuracy 100%
Rank 1st place (out of 4)
Opponents himajintyper (2nd place) pawal001 (3rd place)

Text typed:

The treatment of atoms with more than one electron requires consideration of the effects of interelectronic repulsion, orbital penetration towards the nuclear shielding, and an extra quantum number which specifies the intrinsic energy of the electron in any orbital. All these considerations are necessary to allow construction of the modern form of the periodic classification of the elements.
— (book) by Jack Barrett (see stats)