a1
actinium (chemistry)

strokes 12
radical
strokes after radical 7
锕系元素 錒系元素 a1 xi4 yuan2 su4
actinoids (rare earth series), namely: actinium Ac89 錒|锕, thorium Th90 釷|钍, protoactinium Pa91 鏷|镤, uranium U92 鈾|铀, neptunium Ne93 鎿|镎, plutonium Pu94 鈈|钚, americium Am95 鎇|镅, curium Cm96 鋦|锔, berkelium Bk97 錇|锫, californium Cf98 鐦|锎, einsteinium Es99 鎄|