The number of bent-shaped molecule/s from the following is __________

N$_3^-$, NO$_2^-$, I$_3^-$, O$_3$, SO$_2$

<p>A bent-shaped molecule has a molecular geometry with a central atom bonded to two other atoms and one or two pairs of non-bonding electrons. The VSEPR (Valence Shell Electron Pair Repulsion) theory helps us predict the shapes of molecules.</p> <p>Let&#39;s consider the given molecules:</p> <ol> <li><p>N$_3^-$: The azide ion has a linear shape, not bent. The nitrogen in the middle is connected to two other nitrogens and there are no lone pairs on the central atom.</p> </li><br/> <li><p>NO$_2^-$: The nitrite ion has a bent shape. The central nitrogen atom is connected to two oxygen atoms and has one lone pair of electrons, giving it a bent geometry.</p> </li><br/> <li><p>I$_3^-$: The triiodide ion has a linear shape, not bent. The central iodine atom is connected to two other iodine atoms and there are no lone pairs on the central atom.</p> </li><br/> <li><p>O$_3$: Ozone has a bent shape. The central oxygen atom is connected to two other oxygen atoms and has one lone pair of electrons, giving it a bent geometry.</p> </li><br/> <li><p>SO$_2$: Sulfur dioxide has a bent shape. The central sulfur atom is connected to two oxygen atoms and has one lone pair of electrons, giving it a bent geometry.</p> </li> </ol> <p>Therefore, there are 3 bent-shaped molecules: NO$_2^-$, O$_3$, and SO$_2$.</p>