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What are the 14 isotopes of an element uranium?

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Isotopes of the Element Uranium with a Known Natural Abundance Mass Number Natural Abundance Half-life 234 0.0054% 2.455×10+5 years 235 0.7204% 703.8×10+6 years 238 99.2742% 4.468×10+9 years All Known Isotopes of the Element Uranium Mass Number Half-life Decay Mode Branching Percentage 218 1.5 milliseconds Alpha Decay 100.00 219 42 microseconds Alpha Decay 100.00 220 ≈ 60 nanoseconds Alpha Decay No Data Available Electron Capture No Data Available 221 ≈ 0.7 microseconds Alpha Decay No Data Available Electron Capture No Data Available 222 1.0 microseconds Alpha Decay 100.00 223 18 microseconds Alpha Decay 100.00 Electron Capture 0.20 224 0.9 milliseconds Alpha Decay 100.00 225 60 milliseconds Alpha Decay 100.00 226 0.35 seconds Alpha Decay 100.00 227 1.1 minutes Alpha Decay 100.00 228 9.1 minutes Alpha Decay > 95.00 Electron Capture < 5.00 229 58 minutes Electron Capture ~ 80.00 Alpha Decay ~ 20.00 230 20.8 days Alpha Decay 100.00 Spontaneous Fission < 1E-10 231 4.2 days Electron Capture 100.00 Alpha Decay ~ 4.0E-3 232 68.9 years Alpha Decay 100.00 Emission of a neon nucleus 9E-10 Spontaneous Fission < 1E-12 233 1.592×10+5 years Alpha Decay 100.00 Emission of a neon nucleus 7E-11 Spontaneous Fission < 6E-11 234 2.455×10+5 years Alpha Decay 100.00 Spontaneous Fission 1.6E-9 Emission of a magnesium nucleus 1E-11 Emission of a neon nucleus 9E-12 235 703.8×10+6 years Alpha Decay 100.00 Spontaneous Fission 7.0E-9 Emission of a neon nucleus 8E-10 235m ≈ 25 minutes Isomeric Transition 100.00 236 2.342×10+7 years Alpha Decay 100.00 Spontaneous Fission 9.4E-8 Emission of a magnesium-30 nucleus No Data Available 237 6.75 days Beta-minus Decay 100.00 238 4.468×10+9 years Alpha Decay 100.00 Spontaneous Fission 5.4E-5 239 23.45 minutes Beta-minus Decay 100.00 240 14.1 hours Beta-minus Decay 100.00 241 ≈ 5 minutes Beta-minus Decay No Data Available 242 16.8 minutes Beta-minus Decay 100.00 -------- Nuclear Physics,A729 pag. 337-676, 22 Decembrie 2003. Adrese Internet: http://csnwww.in2p3.fr/AMDC/ http://www-nds.iaea.org/masses/mass.mas03 File cod: mass.mas03 Nr. crt. Izotopul Masa atomică relativă 1. 217U 217,024 368 791 ± 0,000 093 262 2. 218U 218,023 535 671 ± 0,000 032 763 3. 219U 219,024 919 160 ± 0,000 060 946 4.* 220U 220,024 723# ± 0,000 215# 5. 221U 221,026 399# ± 0,000 110# 6. 222U 222,026 086# ± 0,000 108# 7. 223U 223,027 738 600 ± 0,000 076 347 8. 224U 224,027 604 778 ± 0,000 027 176 9. 225U 225,029 390 717 ± 0,000 012 428 10. 226U 226,029 338 702 ± 0,000 013 999 11. 227U 227,031 156 367 ± 0,000 018 104 12. 228U 228,031 374 006 ± 0,000 016 051 13. 229U 229,033 505 939 ± 0,000 006 396 14. 230U 230,033 939 784 ± 0,000 005 110 15. 231U 231,036 293 704 ± 0,000 003 242 16. 232U 232,037 156 152 ± 0,000 002 365 17. 233U 233,039 635 207 ± 0,000 002 904 18. ** 234U 234,040 952 088 ± 0,000 001 960 19. ** 235U 235,043 929 918 ± 0,000 001 957 20. 235mU " 21. 236U 236,045 568 006 ± 0,000 001 960 22. 237U 237,048 730 184 ± 0,000 002 019 23. ** 238U 238,050 788 247 ± 0,000 002 044 24. 238m1U " 25. 238m2U " 26. 239U 239,054 293 299 ± 0,000 002 052 27. 240U 240,056 591 988 ± 0,000 005 533 28. 241U 241,060 330# ± 0,000 320# 29. 242U 242,062 931# ± 0,000 215# 30. *** 243U 243,067 36 (neconfirmat) 31. *** 244U 244,069 95 (neconfirmat) Observaţii: · Semnul # caracterizează valorile estimate (ne-experimentale). · ** Izotopi naturali. · *** Izotopi care nu apar în lucrarea citată. · Unitatea de masă atomică este "unitatea de masă atomică unificată", cu simbolul "u", definită ca a 12-a parte din masa atomică relativă a atomului 12C în stările sale elec-tronice şi nucleare fundamentale şi în sistemul său de coordonate în repaus. Masa ato-mică relativă a atomului 12C este 12,003 241 988 70 ± 0,000 000 004 08. u Value 1.660 538 86 x 10-27 kg Standard uncertainty 0.000 000 28 x 10-27 kg Relative standard uncertainty 1.7 x 10-7Concise form 1.660 538 86(28) x 10-27 kg · Intervalul de încredere al valorilor maselor atomice este de ± 1s.

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Q: What are the 14 isotopes of an element uranium?
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Isotopes Uranium 235 and uranium 238 are only natural isotopes of the element uranium.


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Are uranium 235 and uranium 238 said to be radioactive molecules since they have the same number of protons but different numbers of neutrons?

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