Hydrogen

Hydrogen

Element 1, atomic weight 1.00797. The most abundant element in the universe. Hydrogen occurs as H2 at ambient temperature and pressure, a colorless, odorless, and extremely flammable gas. Discovered in 1766 by Cavendish.

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Category: General chemistry
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hydrogenation

Chemistry; Organic chemistry

Catalytic reaction of hydrogen with other compounds, usually unsaturated; for example, unsaturated cottonseed oil is hydrogenated to form solid fats.

hydrogenation

Industrial machinery; Industrial lubricants

In refining, the chemical addition of hydrogen to a hydrocarbon in the presence of a catalyst; a severe form of hydrogen treating. Hydrogenation may be either destructive or ...

hydrogen

Chemistry; Atmospheric chemistry

A chemical element that exists freely on Earth as a gas and is combined with oxygen in water.

hydrogen

Engineering; Electronic engineering

Symbol, H. A gaseous element. Atomic number, 1. Atomic weight, 1.00794. Used in making semiconductor materials, it is the lightest and most abundant element in the universe.

hydrogenation

Health care; Heart disease

A process used to harden unsaturated liquid vegetable oils into saturated fats.

hydrogenation

Fitness; Weight loss

A chemical way to turn liquid fat (oil) into solid fat. This process creates a new fat called trans fatty acids. Trans fatty acids are found in margarine, shortening, and some ...