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U-234 ( 0.0055% , 2.455E+5 ) U-235 ( 0.720% , 703.8E+6 ) U-238 ( 99.2745% , 4.468E+9 ) Isotopes: U-218 U-219 U-220 U-221 U-222 U-223 U-224 U-225 U-226 U-227 U-228 U-229 U-230 U-231 U-232 U-233 U-236 U-237 U-239 U-240 U-241 U-242 For information on elements, we recommend  . |