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February 15, 2014

In order to understand the chemistry of natural gas, it is important to be familiar with some basic concepts of general chemistry. Here are some definitions you should know:
Matter – anything that has mass and occupies space.
Energy – the capacity to do work or transfer heat.
Elements – substances that cannot be decomposed into simpler substances by chemical changes. There are approximately 112 known elements. Examples: carbon, oxygen, and nitrogen.
Atom – the smallest unit in which an element can exist. Atoms are composed of electrons, protons, and neutrons.
Compounds – pure substances consisting of two or more different elements in a fixed ratio. Examples: water and methane.
Molecule – the smallest unit in which a compound can exist or the normal form in which an element exists. Example: One molecule of water consist of two hydrogen atoms and one oxygen atom. One molecule of nitrogen consist of two atoms of nitrogen.
Mixture – combination of two or more pure substances in which each substance maintains its own composition and properties. Examples: natural gas, gasoline, and air.

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