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 ...

Elements in a group have similar physical and chemical properties and show trends. The table below shows the melting points of most elements in group 1. Melting points are a physical property of ...

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

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.

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 ...