A Guide to the Elements by Albert Stwertka

By Albert Stwertka

Provides the elemental options of chemistry and explains complicated theories ahead of providing a separate article on all of the construction blocks that make up the universe.

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In the internal The combination combustion engines of automobiles produces NO, nitrogen oxide, or in a reaction similar to the lightning. When oxygen form nitrogen dioxide, to corrosive gas. over such released into the Los Angeles cause considerable ters formed by the combination of nitro- worse, the ultra sociate, or free and is a has plagued cities. many The brown- eyes a cities is as well as It many is to the presence Photochemical smog throat. is the name 3 . to usually given produced from automobile exhaust the noxious combination of London in the pres- form tities this smoke and fog that occurred regu- in the 1950s.

Beryllium X rays and extremely transparent to is The pure metal ). : is, for example, therefore used as a sturdy, durable window for X-ray tubes. Beryllium special alloys. is often One beryllium bronze, a is to form the beryllium-copper alloy known as hard metal with the unusual property of fairlv not giving off sparks rial combined with other metals of these when struck. This for the electrical contacts makes it a valuable and hammers employed mate- in explosive environments. These might be chemical laboratories using hydrogen, or factories manufacturing rocket fuel.

Ordinary called air enhanced oil to the oil cannot be used for this purpose because some of the gases that make up air would react with the oil, producing undesired by-products. Many compounds crucial for plant that contain nitrogen are and animal life. Among the great variety of biological molecules that have component nitrogen as a are proteins and nucleic acids. , nitrogen oxide in a reaction similar to the one caused by lightning. nisms converting nitrogen for use bv living tor cells. " Some nitrogen is fixed by lightning.

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