| A | B |
|---|
| Nucleus | Center of the atom |
| Subatomic Particles | Pieces smaller than the atom |
| Proton | Positively Charged |
| Atomic Mass Unit | Measures the mass of subatomic particles |
| Neutron | Neutral Charge |
| Atomic Number | Number of Protons in the Nucleus |
| Isotope | More or less protons than neutrons |
| Mass Number | Protons + Neutrons |
| Atomic Mass | Average mass of all isotopes of an element |
| Electron | Negative Charge |
| Electron Cloud | General place electrons can be found |
| Energy Level | Specific place electrons can be found |
| Quark | Makes protons and neutrons |
| Electromagnetic Force | Keeps electrons in orbit |
| Strong Force | Glues protons together |
| Weak Force | Radioactive Decay |
| Gravity | Weakest Force |
