Final answer:
Ammonia is a molecule made up of one nitrogen and three hydrogen atoms, connected by covalent bonds and forming a trigonal pyramidal shape due to the lone pair of electrons on the nitrogen atom. It is classified as an AB3E molecule.
Step-by-step explanation:
The molecule of ammonia consists of one nitrogen atom and three hydrogen atoms. These atoms are bonded together through covalent bonds forming a trigonal pyramidal shape. The nitrogen atom, located at the center of the molecule, has a lone pair of electrons which contributes to the shape and polarity of the molecule. According to molecular geometry, ammonia is classified as an AB3E molecule, indicating that it has three bonded groups of atoms and one lone pair on the central nitrogen atom.
The three hydrogen atoms are evenly spaced around the nitrogen atom, forming a base of a pyramid with the nitrogen atom at the apex. This structural model helps us understand the physical and chemical properties of ammonia such as its reactivity and basicity. Ammonia is also a key component in many household cleaners and participates in the nitrogen cycle, which is essential for life on Earth.