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Periodic Table
Elements #1 - #20
| Symbol | Element&Atomic# |
|---|---|
| H | Hydrogen #1 |
| He | Helium #2 |
| Li | Lithium #3 |
| Be | Beryllium #4 |
| B | Boron #5 |
| C | Carbon #6 |
| N | Nitrogen #7 |
| O | Oxygen #8 |
| F | Fluorine #9 |
| Ne | Neon #10 |
| Na | Sodium #11 |
| Mg | Magnesium #12 |
| Al | Aluminum #13 |
| Si | Silicon #14 |
| P | Phosphorus #15 |
| S | Sulfur #16 |
| Cl | Chlorine #17 |
| Ar | Argon #18 |
| K | Potassium #19 |
| Ca | Calcium #20 |