The periodic table of elements is a landmark categorization developed in 1869 by the Russian chemist and inventor Dmitri Mendeleev. It arranges all natural and synthetic elements by their atomic ...

We learn the periodic table as the elements arranged according to the atomic number, which is an integer, a whole number. That's the number of protons in an atom of that element.

The familiar chart of elements is highly functional but a touch ugly. This minimalist makeover is a gorgeous (if not practical) alternative. The periodic table may be one of the greatest ...

Revise topics such as atoms, elements and compounds, mixtures, atomic structure, Mendeleev's periodic table, groups in the periodic table and transition metals. BBC Homepage Skip to content ...

Physicists have filled in some longtime blank spaces on the periodic table, calculating electron affinities of the lanthanides, a series of 15 elements known as rare earths.

Posters in chemistry labs are in need of an update. The periodic table now has four new elements, completing its seventh row. The International Union of Pure and Applied Chemistry (IUPAC) and the ...