Why is NH3 classified as a polar molecule? * NH3 is a gas at STP.
N -H bonds are nonpolar.
NH3 molecules have asymmetrical charge distributions.
Nitrogen and hydrogen are both nonmetals.

Select the correct answer from each drop-down menu. to make a table of the elements, dmitri mendeleev sorted the elements according to their . he then split the list of elements into several columns so that elements beside each other had similar .