text: If you have a periodic table of Elements handy look up the elements in the middle to the left of the staircase. If u don't have 1 handy ,look it up. or look up transition elements or metals.. those are the elements that change color\n\nSilver, Gold, Cadmium, Copper, Zinc, Nickel, Cobalt, Aluminum, lead, Magnesium, Potassium, Lithium,