Within these plumes are minerals called iron sulfides, which scientists believe could have helped trigger early chemical reactions that ... iron reacts with hydrogen sulfide—the volcanic gas ...

The iron and sulfur atoms in iron sulfide are joined together ... No atoms are created or destroyed in a chemical reaction. This means that the total mass of the reactants is the same as the ...

Iron-sulfur clusters have ... research by bioinorganic chemists and chemical biologists. These clusters are ideal for electron-transfer and redox reactions because they can access various redox ...