: an arrangement of chemical elements based on the periodic law
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Why China dominates rare earths Rare earths are a group of 17 elements in the middle of the periodic table, including neodymium, cerium and scandium.—Mithil Aggarwal, NBC news, 10 June 2025 Rare earths are a family of 17 metals found near the bottom of the periodic table.—Arkansas Online, 10 June 2025 The two metals appear on the same line in the periodic table with their proton count and also their atomic number separated only by mercury (80) and thallium (81).—Tim Treadgold, Forbes.com, 13 May 2025 This is the conclusion of a new study by physicists from the Los Alamos National Laboratory in New Mexico, which could shine a light on the mysterious origins of the elements at the bottom of the periodic table.—Mohammed Soliman, MSNBC Newsweek, 28 Apr. 2025 See All Example Sentences for periodic table
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