This molecule is trigonal pyramid because it has 3 bonds with Br and one lone pair of electrons and if you look at a tetrahedral trigonal pyramid Lewis Structure you will see it matches
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A compound that does not have a bent molecular shape is carbon dioxide (CO2). It has a linear molecular shape due to the arrangement of the three atoms in a straight line.
The molecular shape of hydrogen iodide (HI) is linear. This is because there are only two atoms in the molecule and no lone pairs on the central iodine atom, leading to a linear geometry.
Isomers.
Nitrogen is a diatomic molecule with a linear shape, as it consists of two nitrogen atoms bonded together.
The molecular shape of ammonia (NH3) is trigonal pyramidal. It has a lone pair of electrons on the nitrogen atom, causing the molecule to have a distorted tetrahedral shape.