U-239

or U 239


Chemistry.

Definition for u-239 (2 of 2)

uranium 239


noun Chemistry.

the uranium isotope with a mass number 239. It is artificially produced by the neutron bombardment of uranium 238.
Also called U-239, U 239.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019