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Periodic Table 1-20
First 20 elements of the periodic table - symbol, name, number, atomic mass.
Element Name | Symbol | Atomic Number | Atomic mass |
---|---|---|---|
Hydrogen | H | 1 | 1 |
Helium | He | 2 | 4 |
Lithium | Li | 3 | 7 |
Beryllium | Be | 4 | 9 |
Boron | B | 5 | 11 |
Carbon | C | 6 | 12 |
Nitrogen | N | 7 | 14 |
Oxygen | O | 8 | 18 |
Fluorine | F | 9 | 19 |
Neon | Ne | 10 | 20 |
Sodium | Na | 11 | 23 |
Magnesium | Mg | 12 | 24 |
Aluminium | Al | 13 | 27 |
Silicon | Si | 14 | 28 |
Phosphorous | P | 15 | 31 |
Sulfur | S | 16 | 32 |
Chlorine | Cl | 17 | 35 |
Argon | Ar | 18 | 40 |
Potassium | K | 19 | 39 |
Calcium | Ca | 20 | 40 |