Which best compares a molecule that has a trigonal planar shape with one that has a trigonal pyramidal shape?
they both contain three lone pairs of electrons around the central atom.
they both contain three atoms around the central atom.
the central atom of the trigonal planar molecule has two lone pairs around it, but the central atom of the trigonal pyramidal molecule has only one.
the central atom of the trigonal planar molecule has two atoms around it, but the central atom of the trigonal pyramidal molecule has only one.