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Define Average atomic mass ?...

Define Average atomic mass ?

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Average atomic mass is defined as the average atomic mass of all atoms in their naturally occuring isotopes.
Examples :
Chlorine consist of chlorine isotope `._(17)CI^(35) and. _(17)CI^(37)` are in the ratio `77:23`, the average atomic mass of chlorine
A(- is bar) is equal to `A_1 X_1 +A_2X_2//X_1+X_2` is equal to `35xx77+37xx23//100` is equal to 35. 46 u.
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