noun🔗ShareCesioThe 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." "Debido a que el cesio es tan reactivo, los científicos deben manipularlo con cuidado en entornos especiales para evitar reacciones peligrosas.elementchemistrysubstancematerialscienceChat with AIVocabulary GamePractice Reading
