Question

check the box next to each molecule on the right that has the shape of the model molecule on the left: model molecules (check all that apply) bro₃⁻ h₃o⁺ nh₃ so₃²⁻ none of the above note for advanced students: the length of bonds and size of atoms in the model is not necessarily realistic. the model is only meant to show you the general geometry and 3d shape of the molecule. you can drag the slider to rotate the model molecule.

Explanation:

Step1: Determine the shape of the model molecule

The model molecule has a trigonal - pyramidal shape.

Step2: Analyze the molecular shapes of the given species

For $BrO_3^-$: The central Br atom has 3 bonding pairs and 1 lone - pair. Using VSEPR (Valence - Shell Electron - Pair Repulsion) theory, it has a trigonal - pyramidal shape.
For $H_3O^+$: The central O atom has 3 bonding pairs and 1 lone - pair. According to VSEPR theory, it has a trigonal - pyramidal shape.
For $NH_3$: The central N atom has 3 bonding pairs and 1 lone - pair. By VSEPR theory, it has a trigonal - pyramidal shape.
For $SO_3^{2 - }$: The central S atom has 3 bonding pairs and 1 lone - pair. Based on VSEPR theory, it has a trigonal - pyramidal shape.

Answer:

$\boxed{BrO_3^-, H_3O^+, NH_3, SO_3^{2 - }}$