light element

heavy element (such as uranium)

chemical element

trace element (chemistry)

rare earth element (chemistry)

trace element (nutrition)

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>]]

lanthanoid (rare earth series), namely: lanthanum La57 [[鑭|镧<lán>]], cerium Ce58 [[鈰|铈<shì>]], praseodymium Pr59 [[鐠|镨<pǔ>]], neodymium Nd60 [[釹|钕<nǚ>]], promethium Pm61 [[鉕|钷<pǒ>]], samarium Sm62 [[釤|钐<shān>]], europium Eu63 [[銪|铕<yǒu>]], gadolinium Gd64 [[釓|钆<gá>]], terbium Tb65 [[鋱|铽<tè>]], dysprosium Dy66 [[鏑|镝<dī>]], holmium Ho67 [[鈥|钬<huǒ>]], erbium Er68 [[鉺|铒<ěr>]], thulium Tm69 [[銩|铥<diū>]], ytterbium Yb70 [[鐿|镱<yì>]], lutetium Lu71 [[鎦|镏<liú>]]

periodic table of the elements (chemistry)

radioactive element

nonmetal (chemistry)