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Isotopes and Relative Atomic Mass
Use the table below to calculate the relative
atomic masses for each element.
Element
Lithium
Isotopes
Percentage
Abudance
7.6%
(6 x 7.6%) + (7 x 92.4%)
Ar = 6.92
92.4%
Magnesium
79%
10%
(24 x79%) + (25x10%) + (26 x 11%)
Ar = 24.32
11%
Copper
70%
(63x70%) + (65x20%)
30%
Ar = 63.3