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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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tomtom1 tomtom1
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12 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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#1
12 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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