The periodic table, also called the periodic table of elements, is an organized arrangement of the 118 known chemical elements. The chemical elements are arranged from left to right and top to bottom ...

Elemental building blocks -- Chemical discoveries -- Inside an atom -- Periodic table of elements -- Reactions and uses -- Hydrogen -- Alkali metals -- Alkaline earth metals -- Transition metals -- ...

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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 new ...

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