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, ...

AUSTIN, Texas — Do you remember your periodic table of elements from school? It might be time for a refresher Thursday since it is officially National Periodic Table Day. Even though it had been used ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. (CNN) — Chemistry textbooks as we know it ...

Chemistry textbooks as we know it are officially out of date, as four new elements will soon be added to the periodic table. Elements 113, 115, 117 and 118 have formally been recognized by the ...

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, ...

The seventh period of the periodic chart is now complete, thanks to the addition of four new elements. For now, they're known by working names, like ununseptium and ununtrium — two of the four new ...

The periodic table of elements has four new entries, meaning its seventh row has finally been completed. The new elements were discovered by chemists in Japan and a joint US-Russian mission. The four ...

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, ...