Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
9th Edition
ISBN: 9781133949640
Author: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher: Cengage Learning
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Chapter 7.6, Problem 5Q

The most common oxidation state of a rare earth element is +3.

  1. a) What is the ground state electron configuration of Sm3+?
  2. b) Write a balanced chemical equation for the reaction of Sm(s) and O2(g) to form samarium(III) oxide.
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The usual oxidation state of boron and aluminum is +3, whereas the heavier elements in group 13 have an increasing tendency to form compounds in the +1 oxidation state. Given that all group 13 elements have an ns2np1 electron configuration, how do you explain this difference between the lighter and heavier group 13 elements?
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Chapter 7 Solutions

Chemistry & Chemical Reactivity

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