# Chapter 9 - Chemical Bonding I - Questions & Problems: 9.84

#### Work Step by Step

We know that a. $CF_2$ it violates octet rule. b. $LiO_2$ it has too much low lattice energy. c. $CsCl_2$ has too much 2nd ionization energy for $Cc^+2$. d. $PI_5$ I is too bulky and can't fit around P.

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