iÂ·onÂ·ic bond. A chemical bond formed between two ions with opposite charges. Ionic bonds form when one atom gives up one or more electrons to another atom. These bonds can form between a pair of atoms or between molecules and are the type of bond found in salts.
The answer is supernovae. In a supernova explosion, neutron capture reactions take place (this is not fusion), leading to the formation of heavy elements. This is the reason why it is said that most of the stuff that we see around us come from stars and supernovae (the heavy elements part).
Requirement: Iron which is considered to be a trace mineral also plays a vital role to perform various body functions. Healthy body requires sufficient amount of iron. Everyday our body requires around 10 mg to 18mg of iron. 70% of iron is stored in hemoglobin and 26% of it is stored in liver, spleen and bones. Importance: Iron is a mineral which is responsible for the conversion of blood sugar into energy.