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Elements 1-20
Term | Definition |
---|---|
Hydrogen | H, 1 |
Helium | He; 2 |
Lithium | Li; 3 |
Beryllium | Be, 4 |
Boron | B, 5 |
Carbon | C, 6 |
Nitrogen | N, 7 |
Oxygen | O, 8 |
Flourine | F, 9 |
Neon | Ne, 10 |
Sodium | Na, 11 |
Magnesium | Mg, 12 |
Aluminum | Al, 13 |
Silicon | Si, 14 |
Phosphorus | P, 15 |
Sulfur | S, 16 |
Chlorine | Cl, 17 |
Argon | Ar, 18 |
Potassium | K, 19 |
Calcium | Ca, 20 |