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Every month in this stunning 16-month wall calendar shows a big beautiful photograph of a featured element and gives information and interesting anecdotes about the history and use of the element. Those featured in the 2020 edition include Bismuth, Strontium, Mercury, Plutonium, Xenon, Lithium, Iodine, Carbon, Copper, Arsenic, Promethium, and Tin. Smaller images of compounds appear within the monthly grid and shows the element’s every-day use. Roomy monthly grids include important dates in chemical history, as well as major North American, British, Australian and New Zealand holidays, and the monthly phases of the moon.