noun🔗Share锕系元素 Any of the 14 radioactive elements of the periodic table that are positioned under the lanthanides, to which they have similar chemistry."My chemistry textbook explains that the actinides are a series of radioactive elements, including uranium and plutonium, located below the lanthanides on the periodic table. "我的化学课本解释说，锕系元素是一系列放射性元素，包括铀和钚，它们在元素周期表上位于镧系元素下方。elementchemistryscienceChat with AIVocabulary GamePractice Reading
