Interpretation: The molecule with the central atom that does not obey the octet rule needs to be determined.
Concept Introduction: According to the octet rule, atoms of an element can gain, lose or share electrons to achieve noble gas electronic configuration.
Explanation of Solution
Reason for correct option/s:
Consider option (a),
In the above molecule, Br has a complete octet, but P has more electrons than the octet.
When there is more than an octet of electrons in a molecule, it is said to be an expanded-valence molecule.
Consider option (b),
The structure of the molecule is represented as follows:
In the above molecule, I have a complete octet, but Al has fewer electrons than an octet.
Reason for incorrect option/s:
Consider option (c)¸
Here, both P and F have complete octets.
Consider option (d),
In the above molecule, both Si and Cl have complete octets thus, the molecule obeys the octet rule.
Chapter 8 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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