How heavy iron really is?
The following are the percentage abundancies of isotopes of F e (atomic number- 26):
-
X 5 4 X 2 2 5 4 Fe − 5 %
-
X 5 6 X 2 2 5 6 Fe − 9 0 %
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X 5 7 X 2 2 5 7 Fe − 5 %
Calculate the atomic mass of F e in amu.
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1 0 0 5 4 × 5 + 5 6 × 9 0 + 5 7 × 5 =55.95