Biochemistry is concerned with compounds of carbon that crawl. Alkanes are usually asymmetric but are nonpolar because they contain no polar bonds. A polyatomic molecule is a particle that contains more than two atoms. A colorless, odorless, flammable gas, found in petroleum and natural gas. It is used as a fuel and as a raw material for building more complex organic molecules.
Propane is the third member of the alkane series.
A structural formula is a diagram that shows how the atoms in a molecule are bonded together. The symbol for carbon is often not drawn.