Chapter 12, Problem 40CR

Interpretation Introduction

Interpretation:

Three examples of molecules whose Lewis structures are exceptions to the octet rule should be given.

Concept Introduction:

Most of the elements having atomic number below 20 follow the octet rule but there are several exceptions for compounds including:

• Lithium, beryllium, boron and aluminum.
• Compounds formed from elements from main group in the third period and below deviate from the octet rule.
• Molecules with an odd number of electrons disobey the octet rule.

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