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WordNet (3.0)
americium
(n)a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms, Syn.atomic number 95, Am
berkelium
(n)a radioactive transuranic element; discovered by bombarding americium with helium, Syn.atomic number 97, Bk
californium
(n)a radioactive transuranic element; discovered by bombarding curium with alpha particles, Syn.atomic number 98, Cf
curium
(n)a radioactive transuranic metallic element; produced by bombarding plutonium with helium nuclei, Syn.atomic number 96, Cm
einsteinium
(n)a radioactive transuranic element produced by bombarding plutonium with neutrons, Syn.Es, atomic number 99, E
fluorine
(n)a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite, Syn.atomic number 9, F
neptunium
(n)a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium, Syn.Np, atomic number 93
plutonium
(n)a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239, Syn.atomic number 94, Pu
protactinium
(n)a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead, Syn.protoactinium, atomic number 91, Pa
thorium
(n)a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands, Syn.Th, atomic number 90
uranium
(n)a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons, Syn.U, atomic number 92
CC-CEDICT CN-EN Dictionary
氟
[氟, fú, ㄈㄨˊ]fluorine F, halogen with atomic number 9#8836[Add to Longdo]
鑀
[鑀, ài, ㄞˋ]einsteinium Es, atomic number 99#578604[Add to Longdo]
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