The vast majority of mass in an element is located in the nucleus, comprised of protons and neutrons. Electrons are considered to have almost no mass, although that they exist at all would imply that...
A nucleon has more mass when it is not bound to the nucleus of an atom. When the nucleon is bound to other nucleons the binding energy that keeps them together comes from the mass of the nucleon....
It is in the atoms of iron that the nucleons have the least mass. Nucleons in iron have the highest binding energy per nucleon of any element. Want to know what the relationship is? Good. Let's...
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