Question

answer the questions about the following model
there are 1 reds (regions of electron density) around the central atom
a. 0 b. 1 c. 2. d. 3 e. 4 f. 5 g. 6
the shape at the central atom is 2
h. diatomic i. linear j. trigonal planar k. bent (120°) l. tetrahedral
m. pyramidal n. bent (109.5°) o. see - saw p. hexahedral q. t - shape
r. octahedral s. square pyramidal t. square planar
if all of the bonds are polar covalent, is the molecule itself polar? 3
u. yes v. no

Explanation:

Step1: Count REDs

Count the number of electron - density regions (REDs) around the central atom. In a tetrahedral - like model (assuming the model is similar to common VSEPR models), if there are 4 bonds or electron - pair regions around the central atom, the number of REDs is 4.

Step2: Determine molecular shape

For a central atom with 4 REDs and no lone pairs (assuming the model is a simple tetrahedral molecule like \(CH_4\)), the molecular shape is tetrahedral.

Step3: Check molecular polarity

If all bonds are polar covalent but the molecule has a symmetrical tetrahedral shape (e.g., \(CCl_4\), where the bond dipoles cancel each other out due to symmetry), the molecule is non - polar.

Answer:

1. E. 4
2. L. tetrahedral
3. V. no