| A | B |
|---|
| Photon | A quantum of light |
| Atomic spectrum | An element's "fingerprint" |
| "n" | Symbol for principle quantum number |
| Two | The maximum number of electrons in an orbital |
| Three | The number of p orbitals in a given energy level |
| Five | The number of d orbitals in a given energy level |
| Six | The maximum number of electrons in a set of p orbitals |
| Photon energy | Directly proportional to photon frequency |
| Orbit | Circular path followed by an object |
| Orbital | A volume of space within which an electron may reside. |
| s orbital | Shaped like a sphere |
| p orbital | Shaped like dumbbell |
