Final answer:
The molecule out of the given options that cannot have an electron dot diagram satisfying the octet rule is ClO₂, which is an odd-electron molecule and an exception to the octet rule. Therefore correct option is B
Step-by-step explanation:
The molecule that cannot have an electron dot diagram that satisfies the octet rule is ClO₂. This is an example of an odd-electron molecule, which is one of the three known exceptions to the octet rule. Odd-electron molecules, such as NO, NO₂, and ClO₂, possess an odd number of electrons and consequently, at least one atom within these molecules cannot satisfy the octet rule due to the presence of unpaired electrons.
Atoms in the second row of the periodic table, like carbon and oxygen, cannot form expanded valence shells due to their limited number of available orbitals. Molecules like CCl₄ (carbon tetrachloride), on the other hand, strictly adhere to the octet rule, as carbon is able to form four covalent bonds to achieve an octet. The molecule NCI₃ (trichloroamine) is also capable of satisfying the octet rule for all the atoms involved.