Only a Few Grams of This Element Exist—and Scientists Have Used It to Break the Rules of the Periodic Table
More than 75 years after its initial discovery, scientists have created an organometallic molecule containing the ...
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Periodic Table of Chemical Elements
The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...
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The periodic table
and all the elements in group 0 are unreactive non-metals. The zigzag, staircase, line in the diagram of the periodic table above separates the metals, on the left, from non-metals, on the right.
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Periodic Table of Chemical Elements
This year marks the 150th anniversary of the publication of Mendeleev’s Periodic Table of Chemical Elements in 1869. In celebration, the United Nations Educational, Scientific, and Cultural ...