Osmium, a chemical element with the symbol Os and atomic number 76. It is a hard, brittle, blue-gray or blue-black transition metal in the platinum family and is the densest natural element, with a density of 22.59 g/cm3 (slightly greater than that of iridium and twice that of lead).
Need a light? Use potato power! With this science experiment for kids, learn how chemical reactions take place between two dissimilar metals and how to create voltage. This is a classic STEM activity that's sure to please :)
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