In a chemical reaction an iron atom became the ion Fe2 plus . What happened to the iron atom?

The iron atom loses two(2) electrons to be come the Iron ION.

Fe = Fe^(2+) + 2e^-

NB An atom , when it becomes a charged spacied , is no longer an atom , but an ION.

Positively charged ions are CATIONS

Negatively charged ions are ANIONS.