Group 1 2   3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Period 1 1 H hydrogen 2 He 2 3 Li lithium 4 Be beryllium 5 B 6 C 7 N 8 O 9 F 10 Ne 3 11 Na sodium 12 Mg magnesium 13 Al 14 Si 15 P 16 [...]

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