Iron is a chemical element with the atomic number 26. It is a metal that belongs to group 8 of the periodic table, and is the most common element on our planet.
- The chemical symbol for Iron is Fe
- It produces 2+ and 3+ ions
- It is part of haemoglobin – a quaternary globular protein
- 4 polypeptide chains
- haem group (Fe²⁺)
- Oxygen binds to this group
- Oxyhaemoglobin contain Fe³⁺ (oxygen and haemoglobin)