As such, the Fenton reaction is preferred, which combines an Fe2+ ("iron two-plus") ion with hydrogen peroxide to produce one molecule of it alongside hydroxide ion.
Lipid peroxidation begins when this molecule attacks fatty acid chains. It can be created by the Haber-Weiss reaction, though yield is poor. As such, the Fenton reaction is preferred, which combines an Fe2+ ("iron two-plus") ion with hydrogen peroxide to produce one molecule of it alongside hydroxide ion. In cells, the superoxide ion is one of its sources, though this radical is best known for its atmospheric role, where it can be measured from sulfur dioxide levels. It is the strongest oxidant in the atmosphere, where it reacts with and neutralizes pollutants such as carbon monoxide, methane, and nitrogen dioxide. For ten points, name this radical with chemical symbol OH (read as individual letters).
Lipid peroxidation begins when this molecule attacks fatty acid chains.
{hydroxyl} radical (accept {OH} before mention)