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 ...

See if you can organize the first 25 elements of the periodic table in order in the quiz below. The periodic table as we know ...

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 ...

Browse a list of curated classroom activities by the American Association of Chemistry Teachers. Lesson Plans: The Periodic Table and Bonding ... among public audiences. The Period Table of Endangered ...

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