Question

Which of the following statements is NOT true for VSEPR theory?

A. It predicts the shape of a molecule based on how many lone pairs and atoms are bonded to a central atom.
B. Cannot be used for simple ionic compounds, only covalent compounds.
C. It is based on the idea that electrons are attracted to negative charges.
D. It helps biochemists analyze larger molecules like DNA and proteins to predict their behavior and shape.

Answer 1

The VSEPR theory is based on the idea that electron pairs in the valence shell repel each other, not that electrons are attracted to negative charges. It predicts molecule shapes and bond angles using Lewis structures.

Step-by-step explanation:

The statement that is NOT true for VSEPR theory is: "It is based on the idea that electrons are attracted to negative charges." VSEPR theory, or the Valence Shell Electron Pair Repulsion theory, is actually based on the premise that electron pairs within the valence shell of an atom will repel each other, thereby adopting an arrangement that minimizes these repulsions by maximizing their distances apart. The theory predicts the molecular structure and approximate bond angles around a central atom from the examination of the number of bonds and lone electron pairs in its Lewis structure. This model is instrumental for determining the shape of small molecules and polyatomic ions, but does not give information about bond lengths or multiple bonds.