News tagged with hydrogen

Related topics: fuel cell · catalyst · hydrogen gas · oxygen · molecules

ESC statement on trans fatty acids

The American Food and Drug Administration (FDA) considers trans fatty acids (TFA) unsafe for consumption. The FDA is providing a three-year compliance period to allow industry to gradually phase out their use in processed ...

Jul 08, 2015
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Trans fat ban tests food companies, bakers

The Jarosch Bakery has been supplying goodies for more than 50 years, winning special renown for its butter cream frosting and for butter cookies with an extra tender texture.

Jun 19, 2015
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US bans 'unsafe' trans fats in food (Update)

Artificial trans fats found in everything from margarine to cookies and frozen pizzas are not safe to eat and must be removed from food in the next three years, US regulators said Tuesday.

Jun 16, 2015
popularity17 comments 1


Hydrogen (pronounced /ˈhaɪdrədʒən/) is the chemical element with atomic number 1. It is represented by the symbol H. At standard temperature and pressure, hydrogen is a colorless, odorless, nonmetallic, tasteless, highly flammable diatomic gas with the molecular formula H2. With an atomic weight of 1.00794 u, hydrogen is the lightest element.

Hydrogen is the most abundant chemical element, constituting roughly 75% of the universe's elemental mass. Stars in the main sequence are mainly composed of hydrogen in its plasma state. Elemental hydrogen is relatively rare on Earth. Industrial production is from hydrocarbons such as methane with most being used "captively" at the production site. The two largest uses are in fossil fuel processing (e.g., hydrocracking) and ammonia production mostly for the fertilizer market. Hydrogen may be produced from water by electrolysis at substantially greater cost than production from natural gas.

The most common isotope of hydrogen is protium (name rarely used, symbol H) with a single proton and no neutrons. In ionic compounds it can take a negative charge (an anion known as a hydride and written as H−), or as a positively-charged species H+. The latter cation is written as though composed of a bare proton, but in reality, hydrogen cations in ionic compounds always occur as more complex species. Hydrogen forms compounds with most elements and is present in water and most organic compounds. It plays a particularly important role in acid-base chemistry with many reactions exchanging protons between soluble molecules. As the only neutral atom with an analytic solution to the Schrödinger equation, the study of the energetics and bonding of the hydrogen atom played a key role in the development of quantum mechanics.

Hydrogen is important in metallurgy as it can embrittle many metals, complicating the design of pipelines and storage tanks. Hydrogen is highly soluble in many rare earth and transition metals and is soluble in both nanocrystalline and amorphous metals. Hydrogen solubility in metals is influenced by local distortions or impurities in the crystal lattice.

This text uses material from Wikipedia, licensed under CC BY-SA

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