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Question

The atomic mass of an element is equal to the ________ of an atom in the atomic mass unit.


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Solution

Average mass:

  1. The average mass of an element's atoms expressed in the atomic mass unit is known as its atomic mass.
  2. The average atomic mass of an element refers to the atomic masses of the element's isotopes, including the various isotope abundances.
  3. An element's nucleus can have a variety of neutrons, but it always has the same amount of protons.
  4. The average atomic mass is usually not a whole number. It can be a fraction also.

Therefore, the atomic mass of an element is equal to the Average mass of an atom in the atomic mass unit.


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