The Average atomic mass of the Uranium is 237.97 amu if the abundance of 234u is 0.01%, 235u is 0.71% and 238u is 99.28% .
The atomic mass is the mass of an atom. The atomic mass of an isotope refers to a certain specific isotope of an element. The average atomic mass is the summation of the masses of the element's isotopes each multiplied by its natural abundance on Earth.
Uranium is a chemical element with the atomic number 92. It contains 3 isotopes. There are three naturally occurring isotopes of uranium: uranium-238, the heaviest and most abundant, uranium-235 and uranium-234. The abundance of 234u is 0.01% , the abundance of 235u is 0.71% and the abundance of 238u is 99.28%. we have to add all the atomic mass of the the elements to get the average mass.
Average atomic mass= (0.01 / 100) (234 amu) + (0.71 / 100)(235 amu) + (99.28 / 100) (238 amu)
= 237.97 amu
The average atomic mass is 237.97 amu
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