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