Question

the particle is bent (3 regions) in shape. what is the closest bond angle around the central atom? 180° 90° 120° 109.5°

Explanation:

Step1: Determine the electron - pair geometry

The central atom \(S\) has \(3\) electron - pair regions ( \(2\) bonding pairs and \(1\) lone pair). According to VSEPR theory, the electron - pair geometry is trigonal planar.

Step2: Consider the effect of lone pair on bond angle

In a trigonal planar electron - pair geometry, the ideal bond angle is \(120^{\circ}\). Although there is a lone pair, which slightly reduces the bond angle, the closest value among the given options for a bent molecule (derived from trigonal planar electron - pair geometry) is \(120^{\circ}\).

Answer:

\(120^{\circ}\)