| A | B |
|---|
| Ionic bonds | a charged particle made of atoms |
| covalent bonds | when 2 atoms share electrons |
| molecule | agrup of atoms held together by covalent bonds |
| compound | a molecule that is composed of atoms of 2 or more different elements |
| ion | an atom with a fifferent number of electrons and protons. A charged particle |
| mass number | the number of protons AND neutrons in a number |
| atomic number | the number of protons in the atom of the element |
| electrons | subatomic particle found orbiting the nucleus with 0 mass and negative charge |
| neutron | subatomic particle found orbiting the nucleus with a neutral charge |
| proton | subatomic particle found in teh nucleus with a positive charge |
| electron energy level | where the electrons are found in an atom |
| nucleus | the center of the atom |
