actinoids (rare earth series), namely: actinium Ac89 [[錒|锕<ā>]], thorium Th90 [[釷|钍<tǔ>]], protoactinium Pa91 [[鏷|镤<pú>]], uranium U92 [[鈾|铀<yóu>]], neptunium Ne93 [[鎿|镎<ná>]], plutonium Pu94 [[鈈|钚<bù>]], americium Am95 [[鎇|镅<méi>]], curium Cm96 [[鋦|锔<jú>]], berkelium Bk97 [[錇|锫<péi>]], californium Cf98 [[鐦|锎<kāi>]], einsteinium Es99 [[鎄|锿<āi>]], fermium Fm100 [[鐨|镄<fèi>]], mendelevium Md101 [[鍆|钔<mén>]], nobelium No102 [[鍩|锘<nuò>]], lawrencium Lr103 [[鐒|铹<láo>]]