noun🔗ShareA chemical element (symbol Ir) with an atomic number of 77: a very hard, brittle, silvery-white transition metal of the platinum group."Because of its extreme hardness and resistance to corrosion, iridium is used in specialized electrical contacts and scientific instruments. "elementchemistrymaterialsubstancescienceChat with AIVocabulary GamePractice Reading
noun🔗ShareA single atom of this element."The scientist carefully isolated a single iridium atom for study under the microscope. "elementchemistrymaterialsubstancescienceChat with AIVocabulary GamePractice Reading
