The average atomic mass of the element is 10.811 u.
What is Average Atomic Mass ?
The average atomic mass (sometimes called atomic weight) of an element is the weighted average mass of the atoms in a naturally occurring sample of the element.
Average masses are generally expressed in unified atomic mass units (u), where 1 u is equal to exactly one-twelfth the mass of a neutral atom of carbon-12.
Each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei.
Hence, differ in relative atomic mass but not in chemical properties; in particular, a bform of an element.
Therefore, The average atomic mass of the element is 10.811 u.
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