Hydrogen, 01, Helium, 02, Lithium, 03, Beryllium, 04, Boron, 05, Carbon, 06, Nitrogen, 07, oxygen, 08, Fluorine, 09, Neon, 10, Sodium, 11, Magnesium, 12, Aluminum, 13, Silicon, 14, Phosphorus, 15, Sulfur, 16, Chlorine, 17, Argon, 18, Potassium, 19, Calcium, 20.

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