The periodic table is arranged in rows and columns that group elements with similar chemical properties above and below each other. Element 119 (also known by its placeholder name, Ununennium ...

150 years ago, Russian chemist Dmitrii Mendeleev created the periodic table of the elements, revolutionizing chemistry.

Since the turn of the century, six new chemical elements have been discovered and subsequently added to the periodic table of elements, the very icon of chemistry. These new elements have high ...