There are three types of GPA that medical schools calculate, and you need to know about each: 1  Overall GPA â The raw GPA calculation of all of your undergraduate coursework combined. 2  BCPM â âScience GPA.â Your GPA for all of your science coursework. This is the big one. 3  AO GPA â âAll Otherâ GPA.
Best Answer: A molecule is formed when two or more atoms join together chemically. A compound is a molecule that contains at least two different elements. All compounds are molecules but not all molecules are compounds. Source(s):
  Triatomic molecule is a molecule that is made up of only 3 atoms.   Thus, the difference is that â¦ a diatomic molecule is made up of only 2 atoms while a triatomic molecule is made up of only 3 atoms. + 30 others found this useful. Garima Jindal.