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Build the periodic table, one element at a time

Nine levels, a hidden-element lab hunt, and a certificate with your name at the end.

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Colour key: columns are groups, rows are periods
H Hydrogen (nonmetal)1 Alkali metals2 Alkaline earth3–12 Transition metals13 Boron14 Carbon15 Nitrogen16 Oxygen17 Halogens18 Noble gasesLanthanides & actinides
Element symbols Drag a symbol onto its cell — or tap the symbol, then tap the cell.

Look closely: tap the faint glints hidden around the lab to find every element on the list.

    Explore the periodic table

    Tap any element to read its fun fact.

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    This certificate is proudly presented to

    for building the complete periodic table — all 118 elements — in the Periodic Table Puzzle.