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Found Hydrogen 6 times.

Displaying results 1 to 10.

1. Hydrogen (H, deuterium, tritium)
Hydrogen is a gas element which has an atomic number of 1 and an atomic weight of 1.0079. It combines with oxygen to form water (H20) and is present in all organic compounds. A few types of bacteria can metabolize atmospheric hydrogen (H2). Hydrogen gas itself is not poisonous, but when it mixes with air it can easily ignite or explode. Hydrogen was discovered by Henry Cavendish in 1766 and was named by Lavoisier. There are two main isotopes of hydrogen: deuterium (2H) and tritium (3H, which is radioactive and is used in some glow-in-the-dark paints and as a tracer in biological studies).

2. Hydrogen bond
A weak electrostatic link between an electronegative atom (such as oxygen) and a hydrogen atom which is linked covalently to another electronegative atom; hydrogen bonding is what makes water stick to itself.

3. Hydrogen bond
A weak bond between two atoms (one of which is hydrogen) with partial but opposite electrical charges.

4. Hydrogen peroxide
This alkaline chemical has the formula H2O2 and the structure H-O-O-H, which is able to break apart into free radical s. It is a clear, dense liquid at room temperature which freezes at -41C and boils at 150.2C. It can be dissolved in water and alcohol s. It is also toxic when concentrated and can be a fire and explosion hazard. Hydrogen peroxide is used in bleaches, dyes, cleansers, antiseptics, and disinfectants. It is generated by the body as a potentially harmful byproduct of aerobic cellular respiration which, if left alone, will cause extensive damage to DNA .

5. Hydrogenase
An enzyme which oxidizes hydrogen (removes its electron s) and attaches it to another molecule.

6. Hydrogenation
* The adding of hydrogen to another molecule. * The adding of hydrogen to unsaturated hydrocarbon s or fatty acid s (hydrocarbons or fatty acids which contain carbon-carbon double bonds). Oils and fats used in making prepared foods are often hydrogenated to improve their shelf life.

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