Structure of an oxygen radical

● The oxygen (O2) of one molecule reacts with the hydrogen (4xH) of four atoms, and becomes water (2H2O). Although the oxygen atom has six electrons outside, since it will be stabilized if it has eight electrons, when two atomic oxygen become together and each originally shares every two electrons, it becomes oxygen of one molecule. Moreover, since atomic hydrogen has only one electron outside, since atomic oxygen is stable, it is going to combine with two atomic hydrogen for stabililization, so it tends to put eight electrons on its surroundings. By the way, when the grape (C6H12O6) obtained from food in our body burns, hydrogen can be first taken from this molecule (an electron can be taken in fact). This will be repeated. Although this atomic hydrogen (in fact electron) is given to oxygen and water will be made, if there is too much oxygen, it will have only one electron although it wants 2 electrons. (Figure reference)

● When there are enough electrons available, two electrons will be given to one oxygen, and with hydrogen ion, water will be created; however, when there are few electrons available, atomic oxygen has only seven electrons, and one of these combines with a hydrogen ion, since there is no remainder, an irregular molecule called –OH will be created. Thus, oxygen without sufficient electron is called free radical. "Free Radical" is because this molecule tends to take an electron for being stabilized from various possible substances (normal cell etc.) and tends to become water.

● For listing major oxygen radical in living body, it will be The super oxide (O2) which oxygen returns as a representative one electron of oxygen radicals, hydrogen peroxide (H2O2), and hydroxyl radical(-OH) etc. Thus, free radical is the phenomenon produced in the process returned by proton transfer systems or electronic transfer systems, such as a proton (hydrogen) and an electron. Finally, detoxifying in oxygen or water is common.

Generation of an oxygen radical

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