Chapter 4.10, Problem 4.24P

Interpretation Introduction

Interpretation:

Most common radical in human body and its biological effect has to be explained.

Concept introduction:

Radical: The species which has one or more unpaired electron.  These unpaired electrons readily makes free radical molecule which are highly unstable and chemically reactive. Free radical are denoted as $R^{•}$.

There are three kind of radical

• Reactive Oxygen species
• Reactive nitrogen species
• Non-radical

Radical are very reactive because they are unstable.  The readily react with two molecule to forms stable molecule.