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Racer afiqah (afiqah)
Race Number 201
Date Tue, 25 Dec 2012 04:10:20 +0000
Speed 50 WPM Try to beat?
Accuracy 88.5%
Rank 4th place (out of 5)
Opponents panuto2 (2nd 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)