Which of the following molecules contain(s)a nitrogen atom that has trigonal pyramidal molecular geometry?

Question

Quizplus · Accepted Answer

The trigonal pyramidal molecular geometry occurs when a central atom is bonded to three atoms and has one lone pair. So, a molecule with this geometry must have a nitrogen atom bonded to three atoms and have one lone pair.

I) NH3 (ammonia) has a nitrogen atom bonded to three hydrogen atoms and has one lone pair, giving it a trigonal pyramidal molecular geometry.
II) CH3NH2 (methylamine) has a nitrogen atom bonded to three hydrogen atoms and one methyl group, making it a tetrahedral molecular geometry and not trigonal pyramidal.
III) H2NCOH (amidogen) has a nitrogen atom bonded to two hydrogen atoms and one hydroxyl group, and does not have a trigonal pyramidal molecular geometry.

Therefore, the only molecule that contains a nitrogen atom with a trigonal pyramidal molecular geometry is NH3, thus the answer is C) III only.

Which of the Following Molecules Contain(s)a Nitrogen Atom That Has