## Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning

# Chapter 12 The Solid State - Study Questions - Page 467a: 14

#### Answer

See the answer below.

#### Work Step by Step

a) Rb is in period 5 and Na in the third, so the sodium radius is smaller and the melting point of NaCl is higher. b) Ba is in period 6 and Mg in the third, so the magnesium radius is smaller and the melting point of MgO is higher. c) MgS has ions of greater charge (magnitude 2).

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