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When this occurs, two fragments of the original molecule are created and are termed initiator fragments, each of which has an unpaired electron.
Composed of one molecule each of oxygen and nitrogen, nitric oxide (NO) is called a free radical because it has an unpaired electron, making it highly reactive and short-lived.
The tiny diatomic gas nitric oxide has an unpaired electron in its outer orbit and in pure form, in either solid or liquid phases, achieves chemical stability by forming dimmers.
According to a quantum biology perspective, energy deposited by each incoming photon creates pairs of free radicals--highly reactive molecules--that each have an unpaired electron.
Free radicals are defined as the chemical species capable of independent existence that contains one or more unpaired electrons in its outermost orbital as a result, are generally more reactive than non-radicals due to their unpaired electron.
Superoxides are toxic free radicals, molecules with one unpaired electron, that the immune system normally uses to kill invading microorganisms.
The unpaired electron of the tocopheroxyl radical thus formed tends to be delocalised rendering the radical more stable.
For the most part they are highly reactive due to their quest to balance or match their unpaired electron.
Free radicals or reactive oxygen species (ROS) are molecules or ions that have an unpaired electron that is desperately seeking to complete a pair.
In chemistry, a free radical is a molecule with an unpaired electron.