Question

answer the questions about the following model
there are 1 reds (regions of electron density) around each central atom
a. 0 b. 1 c. 2. d. 3 e. 4
the shape at the central atom is 2
f. diatomic g. linear h. trigonal planar
i. bent (120°) j. tetrahedral k. pyramidal l. bent (109.5°)
if all of the bonds are polar covalent, is the molecule itself polar? 3
m. yes n. no

Explanation:

Step1: Count REDs

Each central atom has 3 regions of electron density (two bonding pairs and one lone pair).

Step2: Determine shape

With 3 REDs (2 bonding, 1 lone pair), the shape is bent (\(120^{\circ}\)).

Step3: Check polarity

The molecule is polar as the bond dipoles do not cancel out due to the bent shape.

Answer:

1. D. 3
2. I. bent (\(120^{\circ}\))
3. M. yes