| A | B |
|---|
| Compound | group of elements chemically joined together |
| neutrons | nuclear particle with a neutral charge (inside nucleus) |
| electrons | nuclear particle with a negative charge (outside nucleus) |
| Isotopes | radioactive elements with more than one atomic mass number |
| Tracer elements | elements that can be put into a human and followed as they move around the body |
| Ionic bonds | a compound help together by "Ions" or oppositely charged particles |
| Isomers | compound with the same molecular formula but different structural formula's |
| organic chemistry | the study of substances that are made of Carbon |
| amino acids | the chemical building blocks of all protein molecules (about 20 known amino acids) |
| Covalent bonds | a bond that holds different atoms together by sharing electrons between them |
