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Racer Petter (jompakrutt)
Race Number 392
Date Fri, 7 Dec 2012 09:13:35 +0000
Speed 82 WPM Try to beat?
Accuracy 90.8%
Rank 1st place (out of 5)
Opponents dcohen91 (2nd place) merylrachmaninoff (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.
Structure and Bonding (Basic Concepts in Chemistry) (book) by Jack Barrett (see stats)