| lanthanum |
a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
출처: wordnet.princeton.edu/perl/webwn
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| lanthanum |
CAS Number: 7439-91-0. A soft, silvery-white metal that rapidly tarnishes in air and burns easily. It reacts with water to give off hydrogen gas. Used in optical glass and for flints. Chemical formula = La. Molecular weight = 138.9055 g/mol. See This is a test, See This is a test,
출처: www.pca.state.mn.us/gloss/glossary.cfm
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