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first 18 words p.t
| Term | Definition |
|---|---|
| H | hydrogen |
| He | helium |
| Li | lithium |
| Be | beryllium |
| B | boron |
| C | carbon |
| N | nitrogen |
| O | oxygen |
| F | fluorine |
| Ne | neon |
| Na | sodium |
| Mg | magnesium |
| Al | auminum |
| Si | silicon |
| P | phosorus |
| S | Sulphur |
| Cl | Chlorine |
| Ar | Argon |