General Chemistry: Principles and Modern Applications (10th Edition)

Published by Pearson Prentice Hal
ISBN 10: 0132064529
ISBN 13: 978-0-13206-452-1

Chapter 21 - Chemistry of the Main-Group Elements I: Groups 1, 2, 13, and 14 - 21-7 Concept Assessment - Page 940: 21-7


Ions of lithium and magnesium ($\mathrm{Li}^{+}$ and $\mathrm{Mg}$ $^{2+}$) have high charge densities and are strongly polarizing, which in turn provides the ability to stabilize the $\mathrm{N}^{3-}$ anion as follows: $3 \mathrm{Li}(\mathrm{s})+\frac {1} {2} \mathrm{N}_{2}(\mathrm{g}) \rightarrow \mathrm{Li}_{3} \mathrm{N}(\mathrm{s})$ $3 \mathrm{Mg}(\mathrm{s})+\mathrm{N}_{2}(\mathrm{g}) \rightarrow \mathrm{Mg}_{3} \mathrm{N}_{2}(\mathrm{s}) $

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