Test_1_2005F - First Name _ Last Name_ Student No_...

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First Name ________________ Last Name___________________ Student No__________________ September 28, 2005 Tutorial Section/TA__________________________ Page 1 of 3 MSE 101H1F Materials Science - Term Test #1 Total marks for all questions: 10 Marks are not equal for all questions – Marks are shown in left hand margin 1. Phosphorus ( Z = 15) is polyvalent; it can form ions of charge: -3, +3, and +5. Give the electron configuration of atomic (neutral) phosphorus and each of the three ionic states listed above. Clearly label which configuration corresponds to which ion state. 2 P 1s 2 2s 2 2p 6 2s 2 3p 3 P -3 1s 2 2s 2 2p 6 2s 2 3p 6 P +3 1s 2 2s 2 2p 6 2s 2 P +5 1s 2 2s 2 2p 6 2. Give a set of 4 possible quantum numbers for the outermost (valence) electron in Br -1 . Bromine has atomic number 35. 1 Br (36 electrons) 1s 2 2s 2 2p 6 2s 2 3p 6 3d 10 4s 2 4p 6 The 6 electrons in the 4p orbitals are equivalent; all have the same energy and a probability distribution function with the same radial dependence. So any one of the 6 could have any one of the sets of quantum numbers shown below.
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This note was uploaded on 06/08/2010 for the course MSE MSE101 taught by Professor Proframsayscott during the Fall '03 term at University of Toronto- Toronto.

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Test_1_2005F - First Name _ Last Name_ Student No_...

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