Many scientists worked on the problem of organizing the elements, but Dmitri Mendeleev published his first version of the periodic table in 1869, and is most often credited as its inventor. Since then ...

That’s why this periodic table clock really caught our eye. [gocivici]’s idea is a simple one: light up three different elements with three different colors for hours, minutes, and seconds ...

Dmitri Mendeleev, who arranged the first version of our current table, predicted the existence and properties of undiscovered elements that would fill the open spaces in his table. Learn more about ...

The covalent radius (a measure of how large individual atoms are) shows different trends if you ... As you move from left to right across the periodic table, atoms have more electrons in their ...

Scientists have found that our bodies need 28 different elements to function properly. These are almost one-quarter of the periodic table and are mainly found in the first four periods.

While you're watching, look out for where different elements are found in the periodic table. Mrs Roberts: So, here I have an empty pop can. This is made of aluminium. Aluminium is an element.