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elements
elements of the periodic tble
| Term | Definition |
|---|---|
| hydrogen | 1 |
| helium | 2 |
| lithium | 3 |
| berylium | 4 |
| boron | 5 |
| carbon | 6 |
| nitrogen | 7 |
| oxygen | 8 |
| flourine | 9 |
| neon | 10 |
| sodium | 11 |
| magneseum | 12 |
| aluminum | 13 |
| silicone | 14 |
| phosphorus | 15 |
| sulfur | 16 |
| chlorine | 17 |
| argon | 18 |
| potassium | 19 |
| calcium | 20 |