Photo: Haire, R. G., US Department of Energy. Touched up by Materialscientist at en.wikipedia. · Commons · Public domain · Resized
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Einsteinium is a synthetic chemical element; it has symbol Es and atomic number 99 and is a member of the actinide series and the seventh transuranium element.
Image: Haire, R. G., US Department of Energy. Touched up by Materialscientist at en.wikipedia., Public domain · Text from Wikipedia, CC BY-SA 4.0