noun🔗ShareセシウムThe chemical element (symbol Cs) with an atomic number of 55. It is a soft, gold-colored, highly reactive alkali metal."Example Sentence: "Because caesium is so reactive, scientists must handle it carefully in special environments to prevent dangerous reactions." "セシウムは非常に反応性が高いため、科学者は危険な反応を防ぐために特別な環境で注意深く取り扱わなければなりません。elementchemistrysubstancematerialscienceChat with AIVocabulary GamePractice Reading
