And generations of children have sung the words, "hydrogen and helium, lithium, beryllium..." in an attempt to memorise some of the 118 elements. This year, the 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 ...

For example, the element symbol for iron is Fe, from the latin word ferrum for iron. On the periodic table, metals are found on the left and in the middle, and non-metals are on the right.