The formula '2 Fe' indicates that there are 2 atoms of iron. If the formula represents part of a larger compound, the number of atoms is determined by summing the atoms of each element, as in Fe2O3 which contains 5 atoms.
The question asks about the number of atoms in the chemical formula 2 Fe. This formula indicates that there are 2 atoms of iron (Fe).
However, if you are referring to a more complex compound that may come after Fe in the formula and due to a misunderstanding or typo it is not fully provided, the number of atoms would be calculated by adding up the atoms of each element multiplied by their respective coefficients.
As an example, for the compound Fe2O3 (iron(III) oxide), which has an empirical formula showing 2 atoms of iron and 3 atoms of oxygen, the total number of atoms would be 5 atoms per formula unit (2 for iron and 3 for oxygen).