Who knows the first 20 elements of the periodic table?
Hi, I'm wondering if knew of the first 20 elements of the periodic table, and then anyone can You to name? And everyone knows, the little "signs" of them all? (Water = H2O, O2 = oxygen) …
1 H 2 hydrogen helium 3 He L Li 4 Beryllium Be 5 Boron B 6 CC 7 N Nitrogen O Oxygen 8 9 10 11 F Fluorine Neon Sodium Magnesium-Do Na mg 13 12 Aluminium Al Silicon Si 15 P 14 P 16 S 17 of sulfur chlorine argon 18 Cl 19 20 K Potassium Ca Calcium
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