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Lanthanides Definition

Chemistry Glossary Definition of Lanthanides

By Anne Marie Helmenstine, Ph.D., About.com

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Definition: Elements with atomic numbers 58-71 (although there is some dispute over exactly where the lanthanides begin and end!). The lanthanide series is the group of elements in which the 4f sublevel is being filled. See the section on lanthanides for further information.

Also Known As: Rare earth metals, rare earth elements, common earth elements.

Examples: Europium, atomic number 63

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