lanthanum

barium${\displaystyle \longleftarrow }$ 57 ${\displaystyle \longrightarrow }$cerium

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Lanthanum

Pronunciation

• enPR: lăn'thənəm, IPA ^(key): /ˈlænθənəm/

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Noun

Singular lanthanum

Plural none

1. (uncountable) Lanthanum is a metallic (meaning made of metal) element with an atomic number of 57 and symbol La.