Question

answer the questions in the table below about the shape of the amide (nh₂⁻) anion. how many electron groups are around the central nitrogen atom? note: one \electron group\ means one lone pair, one single bond, one double bond, or one triple bond. what phrase best describes the arrangement of these electron groups around the central nitrogen atom? (you may need to use the scrollbar to see all the choices.) select linear bent t - shaped trigonal planar trigonal pyramidal square planar square pyramidal tetrahedral sawhorse

Explanation:

Step1: Count electron - groups

Nitrogen in $NH_{2}^{-}$ has 2 N - H single bonds and 2 lone pairs. So, the number of electron - groups is $2 + 2=4$.

Step2: Determine electron - group arrangement

According to VSEPR (Valence - Shell Electron - Pair Repulsion) theory, when the central atom has 4 electron - groups, the electron - group arrangement is tetrahedral.

Answer:

4
tetrahedral