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Periodic Table #1
| Element | Symbol | Number |
|---|---|---|
| Lithium | Li | 3 |
| Beryllium | Be | 4 |
| Sodium | Na | 11 |
| Magnesium | Mg | 12 |
| Potassium | K | 19 |
| Calcium | Ca | 20 |
| Rubidium | Rb | 37 |
| Strontium | Sr | 38 |
| Cesium | Cs | 55 |
| Barium | Ba | 56 |
| Francium | Fr | 87 |
| Radium | Ra | 88 |
| Hydrogen | H | 1 |