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First 20 Elements
First 20 Elements-The most used
| Atomic # | Name/Symbol |
|---|---|
| 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 - Fluorine |
| 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 |