Chapter 9, Problem 28RQ

The ammonia molecule, ${\text{NH}}_{\text{3}}$, can combine with a hydrogen ion, ${\text{H}}^{\text{+}}$ (which has an empty 1s orbital), to form the ammonium ion, ${\text{NH}}_{\text{4}}{}^{\text{+}}$. (This is how ammonia can neutralize acid and therefore function as a base.) Sketch the geometry of the ammonium ion, indicating the bond angles.