Every school has its "group IIB." These slackers believe ignorance is bliss and wonder why they're in school in the first place.

Group IIB is also a set of transition metals, occupying column 10 of the periodic table. Group IIB elements include zinc, cadmium, and mercury.

Group IIB is not a group; it is a set. A group is a set with an associative invertible binary operation.

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