This year is the International Year of the Periodic Table of Chemical Elements—and today (March 6), the modern version celebrates its 150 th birthday.. To find out more about the table and how ...

Can you name everything from Ac to Zr? Test your knowledge of the periodic table and see if you can top the leaderboard ...

Discover the history, structure, and importance of the periodic table of elements, from Mendeleev’s discovery to modern scientific applications.

Groups of the Periodic table. Alkali metals: The alkali metals make up most of Group 1, the table's first column. Shiny and soft enough to cut with a knife, ...

Ever wondered what makes Hydrogen number 1 on the periodic table? There's a reason. Discover the intelligent design of the periodic table with BBC Bitesize.

Atoms in the same column (group) in the periodic table have the same number of valence electrons. Summary. Students will again focus on the first 20 elements. Students will first look at a diagram and ...

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 new interactive table features 44 elements in seven groups – Content, Architecture, Code, Credibility, Links, User and Performance.

The periodic table is a good example of how scientific ideas develop over time. Mendeleev left gaps in his table when he drew it up in 1869, using his insights to predict that scientists would ...