For which of the following molecules is the electron pair geometry tetrahedral and the molecular geometry pyramidal? A)SF₄ B)SiH₄ C)BF₃ D)PH₃ E)ClF₃

Question

Quizplus · Accepted Answer

The electron pair geometry of tetrahedral indicates that there are four electron pairs surrounding the central atom. This geometry can be found in all of the answer choices. However, the molecular geometry of pyramidal indicates that there are three atoms surrounding the central atom and one lone pair of electrons. Only choice D, PH3, fits this description. The central phosphorus atom has three atoms surrounding it (three hydrogen atoms) and one lone pair of electrons, giving it a pyramidal shape. Therefore, the correct answer is D.

For Which of the Following Molecules Is the Electron Pair