Which of the following has pseudo-inert gas configuration in the (n-1) shell?A.Typical transition elementsB.Zinc group elementsC.Both of the aboveD.None of the above

The term "pseudo-inert gas configuration" typically refers to the electron configuration of noble gases, which have a stable and fully filled outermost electron shell. In the context of the periodic table, the noble gases have electron configurations that end in s2p6, which is a fully filled outermost shell.

Among the options provided:

A. Typical transition elements: Transition elements are not known for having pseudo-inert gas configurations in the (n-1) shell. They often have partially filled d-orbitals in the (n-1) shell.

B. Zinc group elements: The zinc group elements, also known as Group 12 elements (including zinc, cadmium, and mercury), are not typically considered to have pseudo-inert gas configurations in the (n-1) shell. They have partially filled d-orbitals.

So, the correct answer is D. None of the above. Neither typical transition elements nor zinc group elements have pseudo-inert gas configurations in the (n-1) shell.