The red color of rubies is the result of the substitution of some Cr 3+ ions for

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The red color of rubies is the result of the substitution of some Cr3+ ions for Al3+ ions in solid Al2O3

(a) Using spdf notation with the noble gas notation, write the electron configuration for the Cr atom and for the Cr3+ ion?

(b) Is Cr2+ paramagnetic? Is Cr3+?

(c) The radius of the Cr3+ ion is 64 pm. How does this compare with the radius of the Al3+ ion?

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Chemistry And Chemical Reactivity

ISBN: 9780357001172

10th Edition

Authors: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

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