Question

What is the meaning of this symbol Fe2+​

Answer 1

Fe is the element Iron, the 2+ is how many electrons is lost to make the ion, so 2 electrons are lost from the valence shell (to make a full outermost shell)

Answer 2

Fe is the element Iron, the 2+ is the amount of ions is has lost to make the ion so 2 electrons are lost from the valence shell (to make a full outermost shell)

Fe=Iron