Question

1. what shape is the following: (0.5 points) *

$ch_4$
○ linear
○ bent
○ trigonal pyramidal
○ trigonal planar
○ tetrahedral

1. what shape is the following: (0.5 points) *

$no_2^{-1}$
○ linear
○ bent
○ trigonal pyramidal
○ trigonal planar
○ tetrahedral

Explanation:

Step1: Determine shape of CH₄

Carbon in CH₄ has 4 bonding pairs, no lone pairs. Geometry is tetrahedral.

Step2: Determine shape of NO₂⁻

Nitrogen in NO₂⁻ has 2 bonding pairs, 1 lone pair. Geometry is bent.

Answer:

1. Tetrahedral
2. Bent