I'm writing a report on the spectrophotometric determination of iron. In my introduction I want to briefly explain the importance of iron in the human body.
Wikipedia states that "Iron is essential to life due to its unusual flexibility to serve as both an electron donor and acceptor"
1.) So is iron the only element that can do that? If not, what is it about iron that makes it the only element found in hemoglobin?
2.) What is it about being able to gain and lose electrons make it essential to life? I think it has something to do with oxygen being able to bind with iron. But there are so many elements that can bind with iron! What is special about iron?