Question

atomic mass of an element
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Answer 1

Answer:

The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope.

Answer 2

Atomic mass varies for different elements and it is calculated by keeping carbon 12 as reference

example::

Hydrogen Atom (H) - 1 amu

there are many more..

here amu is atomic mass unit which is the most commonly used unit for calculating atomic masses..

Hope it helps!