Question

by which method ions can be form​

Answer 1

Answer:

The production of iron from its ore involves a redox reaction carried out in a blast furnace. The furnace is filled at the top with the iron ore oxide most commonly hematite (Fe2O3) but can also magnetite (Fe3O4), carbon called coke and limestone (CaCO3).

Answer 2

Ions are formed when atoms lose or gain electrons in order to fulfill the octet rule and have full outer valence electron shells. When they lose electrons, they become positively charged and are named cations. When they gain electrons, they are negatively charged and are named anions.