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Strontium is softer than calcium and decomposes water more vigorously.
Freshly cut strontium has a silvery appearance, but rapidly turns a yellowish colour with the formation of the oxide. The finely divided metal ignites spontaneously in air. Volatile strontium salts impart an excellent crimson colour to flames, and these salts are used in pyrotechnics. To play the movies, you need QuickTime for MacOS or Windows installed, or some other MPEG movie viewer. The picture above shows the result of adding different metal salts to a burning reaction mixture of potassium chlorate and sucrose.