Periodic Table Puzzle name: period:

The following Periodic Table shows only the Groups 1,2 and 13-18. elements. Note that the atomic numbers jump from 20 to 31 in the fourth period. This is because elements 21 through 30, the transition elements, belong Groups 3-12. Group 1 Group 2 Group 13 Group 14Group 15Group 16 Group 17 Group 18 1 3 11 19 4 12 20 5 13 31 6 14 32 7 15 33 8 16 ... ................
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