This year we celebrate the 150 th anniversary of Mendeleev’s achievement in formulating the structure of the periodic table that we use today. He announced his structure in 1869, but the challenge of ...

Some element symbols are simple. For example ... 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.

Want to learn more about this centerpiece of chemistry? Take your pick from this collection of links about elements and the periodic table! Build an element ball, solve periodic puzzles, and check out ...

We're so familiar with uranium and plutonium that it's easy to miss that they are named after the seventh and ninth planets ... neptunium - element number 93 in the periodic table. In June 1940, ...