How many isotops does uranium have?

Answer 1

List of uranium isotopes:

No.IsotopeRelative Atomic Mass 1.217U217,024 368 791 ± 0,000 093 262 2.218U 218,023 535 671 ± 0,000 032 763 3.219U219,024 919 160 ± 0,000 060 946 4.*220U220,024 723# ± 0,000 215# 5.221U221,026 399# ± 0,000 110# 6.222U222,026 086# ± 0,000 108# 7.223U223,027 738 600 ± 0,000 076 347 8.224U224,027 604 778 ± 0,000 027 176 9.225U225,029 390 717 ± 0,000 012 42810.226U226,029 338 702 ± 0,000 013 99911.227U227,031 156 367 ± 0,000 018 10412.228U228,031 374 006 ± 0,000 016 05113.229U229,033 505 939 ± 0,000 006 39614.230U230,033 939 784 ± 0,000 005 11015.231U231,036 293 704 ± 0,000 003 24216.232U232,037 156 152 ± 0,000 002 36517.233U233,039 635 207 ± 0,000 002 90418. **234U234,040 952 088 ± 0,000 001 960

(natural isotope)19. **235U235,043 929 918 ± 0,000 001 957

(natural isotope)20. 235mU "21.236U236,045 568 006 ± 0,000 001 96022.237U237,048 730 184 ± 0,000 002 01923. **238U238,050 788 247 ± 0,000 002 044

(natural isotope)24. 238m1U " 25. 238m2U "26.239U239,054 293 299 ± 0,000 002 05227.240U240,056 591 988 ± 0,000 005 53328.241U241,060 330# ± 0,000 320#29.242U242,062 931# ± 0,000 215#30. ***243U243,067 36 (not surely identified)31. ***244U244,069 95 (not surely identified)

Answer 2

My 1959 reference lists 10 isotopes, from Uranium-231 to Uranium-240. More can probably be made as the shortest half listed is 23.5 minutes for Uranium-239 and researchers are now creating elements at the far end of the Periodic Table whose longest halflife is only a tiny fraction of a second.

If your question was about naturally occurring isotopes, there are only 3, Uranium-234 (0.0058%), Uranium-235 (0.720%), and Uranium-238 (99.274%).

Answer 3

List of uranium isotopes:

No.IsotopeRelative atomic mass 1.217U217,024 368 791