Lanthanum: Difference between revisions

From Citizendium
Jump to navigation Jump to search
imported>David Yamakuchi
mNo edit summary
imported>David Yamakuchi
mNo edit summary
Line 1: Line 1:
{{subpages}}{{Basic elemental info}}
{{subpages}}{{Basic elemental info}}


A white, soft element, Lanthanum also belongs to the rare earth metals, and is namesake of the [[lanthanides]], a group of elements in the Periodic Table.<references/>
A white, soft element, Lanthanum is classified in a number of different "categories" of elements.  In addition to being a transition metal, it belongs to the [[rare earth metals]], (which include [[Scandium]], [[Yttrium]], and [[Actinium]]), and is also the namesake of the [[lanthanides]], a group of elements in the Periodic Table having [[atomic number]]s from 57 (Lanthinide itself) to 71 ([[Lutetium]]).<references/>

Revision as of 16:00, 10 May 2010

This article is a stub and thus not approved.
Main Article
Discussion
Related Articles  [?]
Bibliography  [?]
External Links  [?]
Citable Version  [?]
Properties [?]
 
This editable Main Article is under development and subject to a disclaimer.

Lanthanum is a chemical element, having the chemical symbol La.

Lanthanum
138.9055(2)



  La
57
[ ? ] Transition metal:

Its atomic number (the number of protons) is 57. It has a Standard Atomic Weight of 138.9055(2), and is typically found as a solid in its elemental form.

Lanthanum is considered to be a member of the "Transition metal" class of elements, has a boiling point of 3,464 °C , and a melting point of 918 °C .

A white, soft element, Lanthanum is classified in a number of different "categories" of elements. In addition to being a transition metal, it belongs to the rare earth metals, (which include Scandium, Yttrium, and Actinium), and is also the namesake of the lanthanides, a group of elements in the Periodic Table having atomic numbers from 57 (Lanthinide itself) to 71 (Lutetium).