The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

As we have seen, Mendeleev was not the first to attempt to find order within the elements, but it is his attempt that was so successful that it now forms the basis of the modern periodic table.

known as "element 120," which would be so hefty that it would need to be put in a new row on the periodic table of elements.

But how many of these elements do you know? Test your knowledge and compete with other Live Science readers to see who can ...

Developing the periodic table The periodic table was developed by grouping elements with similar properties. This, together with a later arrangement by atomic weight, led to a repeating pattern of ...

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.

They obtained a beautiful scale that works both for small and large differences in electronegativity. The new scale uses electronegativity as a dimensionless quantity, which is very practical and ...

The covalent radius (a measure of how large individual atoms are ... As you move from left to right across the periodic table, atoms have more electrons in their outer energy level and more ...