Question

question 2 of 10
how does a lone pair contribute to molecular shape?
a. it is too small to affect the molecules shape.
b. it takes up space like an \invisible\ atom.
c. it lets the bonding pairs spread out more.
d. it forces the molecule into a tetrahedral shape.

Explanation:

Lone - pair electrons in a molecule occupy space and repel bonding pairs and other lone - pairs. They act like an "invisible" atom influencing the molecular geometry. Option A is incorrect as lone pairs do affect shape. Option C is wrong because lone pairs actually push bonding pairs closer together due to greater repulsion. Option D is incorrect as not all molecules with lone pairs are tetrahedral.

Answer:

B. It takes up space like an "invisible" atom.