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What is the mass of a Uranium - 238 nucleus in kg?

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The atomic mass number of ²³⁸U is the total number of nucleons in the nucleus, indicated by the superscripted number preceding the atomic symbol U, 238. The current estimate of the atomic mass of ground-state ²³⁸U is (238.050 788 2 ± 0.000 002 0) u. 463 Views. read more

An atom of Uranium is about 3.95 times 10 to the -22nd grams. Or 3.95 times 10 to the -25th kilograms. So you would need 3.95 times 10 to the 25th atoms to make up a kilogram. Note that a gallon jug-sized chunk of uranium weighs about 150 pounds. read more

Surplus highly enriched uranium can be downblended with depleted uranium or natural uranium to turn it into low enriched uranium suitable for use in commercial nuclear fuel. 238 U from depleted uranium and natural uranium is also used with recycled Pu-239 from nuclear weapons stockpiles for making mixed oxide fuel (MOX), which is now being redirected to become fuel for nuclear reactors. read more

(1 amu= 1.66 x 10-27 kg; 1 J = 1 kg m2/s2) 2.38 x - 1510079 read more

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Atomic and nuclear masses
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