錒系元素

1. • actinoids (rare earth series), namely: actinium Ac89 锕 ā, thorium Th90 钍 tǔ, protoactinium Pa91 镤 pú, uranium U92 铀 yóu, neptunium Ne93 镎 ná, plutonium Pu94 钚 bù, americium Am95 镅 méi, curium Cm96 锔 jú, berkelium Bk97 锫 péi, californium Cf98 锎 kāi, einsteinium Es99 锿 āi, fermium Fm100 镄 fèi, mendelevium Md101 钔 mén, nobelium No102 锘 nuò, lawrencium Lr103 铹 láo

Character by character

• 錒(ā)actinium
• 系(xì)connect
• 元(yuán)surname Yuan
• 素(sù)raw silk