What is a free radical?
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Usually electrons are paired up, but sometimes you will get unpaired (single) electrons sticking out of a molecule.\n\nThese things are highly unstable and reactive because electrons like to be in pairs. Because it involves taking/losing of electrons, it is a redox reaction. When these get in our bodies they do all sorts of awful things like give you cancer :) That's why we like to eat antioxidants.
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Antioxidants don't work on normal oxygen atoms, but rather on oxygen radicals.  Radicals are ionized forms of atoms or molecules that have surprisingly destructive properties and can actually cause cells to die.  Oxygen as a normal bivalent molecule (it usually floats around in pairs such as O2) has enough of its electron shells filled that it has an overall charge of zero, thereby minimizing the potential for oxidation.
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d) Reducing agent. Oxidation is the loss of electrons. The substance getting oxidized donates the electrons to the subnstance getting reduced. For that reason, a) Electron donor is also correct.\n\nI don't know if you're allowed more than one answer to this question. It may be that the teacher did not see that the reducing agent was an electron donor, and thought of electron donation in the Lewis base sense, which does not come up in this question.
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Well Im not sure what youre exactly looking for but the basics of it is oxidation passes the electron and reduction accepts the electron.  There are some basic rules for assigning oxidation number and its best to memorize them for a test or something
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Oxidizers are chemicals that have highly electronegative atoms (things like O, F, and Cl) that will try to take electrons away from atoms with less electronegativity.  O2 is the classic example.  An oxidizer will react with a reducer to form a redox reaction (aka an Oxidation/reduction reaction).  With powerful oxidizers, important things like DNA can act as a reducer.  The result is that oxidizers can damage DNA.  Antioxidants act as free reducers (ie they have an excess of electrons and little electronegativity) in the bloodstream that dangerous oxidizers will react with, hence lowering the risk for our DNA and such.
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It's a great antioxydent...\n\nCoenzyme Q10 is a vitamin like compound also called ubiqueinone.  It is an essential component of cells and is utilized by the mitochondria in the normal process of energy production.  CoQ10 is constantly being reduced and oxidized as an energy carrier.
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I am not sure what you are asking but the answer could be a monoatomic ion. The positive being a cation and the negative being an anion.\n\nYou might ask over at http://forums.mychemistrytutor.com though.
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Valence Shell Electron Pair Repulsion theory (VSEPR) is a set of rules whereby the chemist may predict the shape of an isolated molecule. It is based on the premise that groups of electrons surrounding a central atom repel each other, and that to minimize the overall energy of the molecule, these groups of electrons try to get as far apart as possible. Groups of electrons can refer to electrons that participate in a bond (single, double, or triple) to another atom, or to non-bonding electrons (e.g. lone pair electrons).
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Antioxidants combat or prevent oxidative stress in the body. One of the by products of your body using oxygen for fuel is that it produces oxidants, these are also known as free radicals, free radicals can also be "other" substances that are harmful to the body like environmental toxins etc. Antioxidants destroy these thing and help to keep your immune system functioning well. Antioxidants are found in plentiful supplies in most fresh fruits and vegetables. Some in red wine, teas and other herbs. They are a good thing to have plenty of. Some antioxidants prevent DNA damage and are instrumental in fighting such diseases as cancer and more.\n\nHope this helps.\n\nCraig - Naturopath.
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You asked several questions.  My answer applies to the generation of "free electrons".\n   If you can, picture the structure of an electronic vacuum tube, the invention of which (the triode, at least) is attributed to Lee Deforest. Thomas Edison worked on  similar devices.\n1) A material (such as Thorium) is electrically heated to a temperature such that electrons are "boiled off" and are electrostatically attracted to a positively (voltage) charged "plate" in a vacuum.  This flow of free electrons is a current (amperes).\n2) These electrons are NOT recycled.  The Thorium gradually deteriorates - is worn out.  \n3)  In a similar manner, this may be a source of electrons in the devices you mention.
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What peroxide? Hydrogen peroxide es colorless
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oxigen normally takes two electrons from another atom to complete its valence .. but I dont know what you mean\n\nwhen you burn something.. youre reacting it with heat and oxigen.. so thats one way it reacts\ni hope it helped
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Oxidation describes the loss of an electron by a molecule, atom, or ion; loss of hydrogen, or gain of oxygen. It also means an increase in oxidation number
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something about chemistry
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flammable , orderless, colorless . have low frozen point ,reactive
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It's a carbon-hydrogen chain. \nIt is used in organic reactions.
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Hi. DNA is a very simple structure that has a very complicated role. Free radicals (oxygen ions, for instance) can damage the DNA in a cell. It would require removal of the cell's DNA to do what you propose. May be better to neutralize free radicals in the first place.