The term "gram atom" is an older unit of measurement that is not commonly used today. It is equivalent to one mole of a substance, representing Avogadro's number of atoms of that element.
To determine the mass of 1 gram atom of iron, we need to know the molar mass of iron (Fe). The molar mass of iron is approximately 55.845 grams per mole (g/mol).
Since 1 gram atom of iron is equivalent to 1 mole of iron, the mass of 1 gram atom of iron would be equal to the molar mass of iron:
Mass = Molar mass = 55.845 g/mol
Therefore, the mass of 1 gram atom of iron is approximately 55.845 grams.