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lanthanide

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  • The lanthanide or lanthanoid (IUPAC nomenclature)[1] series comprises the fifteen elements with atomic numbers 57 through 71, from lanthanum to lutetium.[2][3] All lanthanides are f-block elements, corresponding to the filling of the 4f electron shell. — “Lanthanide - Wikipedia, the free encyclopedia”, en.wikipedia.org
  • Lanthanide contraction is a term used in chemistry to describe the decrease in ionic radii of the elements in the lanthanide series from atomic number 58, Cerium to 71, Lutetium, which results in smaller than otherwise expected ionic radii for. — “Lanthanide contraction - Wikipedia, the free encyclopedia”, en.wikipedia.org
  • The lanthanoid (according to IUPAC terminology) (previously lanthanide) series is made of the 15 elements with atomic numbers 57 through 71, from lanthanum to lutetium. [1] [2] All lanthanoids are f-block elements, corresponding to the filling. — “Lanthanide - Simple English Wikipedia, the free encyclopedia”, simple.wikipedia.org

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