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Groups 1, 2, and 18
Periodic Table
| Term | Definition |
|---|---|
| H | hydrogen |
| Li | lithium |
| Na | sodium |
| K | potassium |
| Rb | rubidium |
| Cs | cesium |
| Fr | francium |
| Be | beryllium |
| Mg | magnesium |
| Ca | calcium |
| Sr | strontium |
| Ba | barium |
| Ra | radium |
| He | helium |
| Ne | neon |
| Ar | argon |
| Kr | krypton |
| Xe | xenon |
| Rn | radon |