what is a molecule. Share with your friends Share 0 Aaseema Zahra answered this A molecule is a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction. HOPE THIS HELPS U!!! 3 View Full Answer Jekeel Shah answered this when 2 or more atoms combine together they form a molecule which may be homogenous or hetrogenous in nature. -1 Nikhita answered this The combination of atoms is called as a molecule. All the solids, liquids and gases are made up of molecules. 1