Metal or Not
Sort the metals from the non-metals on the periodic table. Most of the periodic table is made of metals, but this metal or not quiz mixes 14 metals with 14 elements that are not. Click only the metals, and three wrong clicks end the game. Some metals do not behave the way you might expect: sodium and potassium are soft enough to cut with a knife, and gallium melts in your hand.

Minefield: click the right answers, avoid the mines.
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