Question

1. drag and drop the molecular shapes with the lewis structures.

choices
trigonal pyramidal
linear
bent
trigonal planar
tetrahedral

Explanation:

First Molecule (PF₃)

Step1: Determine electron groups

The central P atom has 3 bonding groups (to F) and 1 lone pair, total 4 electron groups.

Step2: Determine molecular shape

With 3 bonding and 1 lone pair, the shape is trigonal pyramidal (electron geometry tetrahedral, molecular shape trigonal pyramidal).

Second Molecule (BeF₂)

Step1: Determine electron groups

Central Be has 2 bonding groups (to F), no lone pairs, total 2 electron groups.

Step2: Determine molecular shape

With 2 bonding and 0 lone pairs, the shape is linear (electron geometry and molecular shape linear).

Third Molecule (CCl₄)

Step1: Determine electron groups

Central C has 4 bonding groups (to Cl), no lone pairs, total 4 electron groups.

Step2: Determine molecular shape

With 4 bonding and 0 lone pairs, the shape is tetrahedral (electron geometry and molecular shape tetrahedral).

Answer:

• PF₃: trigonal pyramidal
• BeF₂: linear
• CCl₄: tetrahedral