By Albert Stwertka
Offers the fundamental techniques 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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Extra info for A Guide to the Elements
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. Nitrogen dioxide in the air a corrosive acid can also react with water known as nitric acid. In small can be beneficial, contributing nitrogen to the large quantities, however, the nitric acid droplets that monuments, and animal ( of nitrogen dioxide. form ozone, from automobiles earth during rainstorms cause considerable due to harmful to plants structural materials such as rubber also reacts with the exhaust to the pollutants air to over some radiation present in sunlight can dis- ence of sunlight.
However, this acid has the ability to dissolve glass An rine- 18, and is artificially is used to etch designs on glass objects. made, radioactive isotope of fluorine, one of several isotopes used in the fluo- medical procedure called positron emission tomograph}' (PET). Fluorine- 18 sponta- neously emits positrons, which are the antiparticles of electrons and resemble the When a latter in every respect but their electric charge. positron collides with an electron, the two particles "annihilate" each other, yielding a burst of energy that takes the form of X-ray-like radiation.
Is mixed with day, it shock-resistant explosive. Nobel the Nobel Prize with the fortune he made this discovery. When nitric acid is neutralized with bases such as sodium and potassium hydroxide, called nitrates. Nitrates oxide He it forms compounds and another group of nitrogen compounds known and other preserved food as nitrites are added to help prevent the to canned growth of botulism bacteria and to preserve the appearance of meat products. After some brown because of nitrates and becomes less time, stored meat begins to turn the oxidation of blood in the meat.