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typeracer

Pit Stop
Racer David (krilohd)
Race Number 32
Date Sun, 24 Jan 2016 3:29:15
Speed 75 WPM Try to beat?
Accuracy 95.4%
Rank 2nd place (out of 4)
Opponents brunoyb (3rd place) krypticwow (4th 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)