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For now, they're known by working names, like ununseptium and ununtrium — two of the four new chemical elements whose discovery has been officially verified. The elements with atomic numbers 113, 115, ...

Four recently discovered substances are joining the periodic table of the elements, filling in key blank spots in chemistry’s official compendium of the basic building blocks of the universe. The ...

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 ...