Iron has three major isotopes: 54Fe (atomic mass =
53.9396 u; abundance 5.85%), 56Fe (atomic mass =
55.9349 u; abundance 91.75%), and 57Fe (atomic
mass = 56.9354 u; abundance 2.12 %). Calculate the atomic
weight (average atomic mass) of iron.
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Master Atomic Mass with a bite sized video explanation from Jules Bruno