Welcome, Darmstadtium (Ds), Roentgenium (Rg), and Copernicium (Cn)—three new elements that joined the Periodic Table earlier this month. None exist in nature. In fact, they don't exist very long even in the laboratory. But there they are, nonetheless.
Periodic Table adds new elements
Thursday, November 17, 2011
Periodic Table adds new elements
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