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 ...

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

Meyer did contribute to the development of the periodic table in another way though. He was the first person to recognise the periodic trends in the properties of elements, and the graph shows the ...

Using the periodic trend of group 1 elements, can you predict how a small piece of potassium (K) will react when it is added to water? Non-metal elements are on the right of the periodic table.

The periodic table of elements (often known simply as the periodic table) has been helping scientists with their work for a little over 150 years. The handy visual reference guide organizes known ...

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 ...