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tomtom1 tomtom1
wrote...
Posts: 88
Rep: 2 0
11 years ago
What is the average atomic mass for
 an element (number presented below
the element symbol on the periodic table)? 5 points to the best answer
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wrote...
11 years ago
It is the weighted average of the atomic masses of all naturally occurring isotopes of the element.
For example, if an element has 24% of isotope of mass Y, it will contribute Y x 24/100 to the stated mass in the periodic table.
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