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Molecular formula : MW : CAS :
nature : a chemical test. Elemental symbol molecule compounds elements of the atomic ratio of formula. Many compounds such as ionic compounds in ordinary circumstances is not to molecular patterns exist, no molecular weight, the practical application on the experiment - representative. For example, sodium chloride is the NaCl-type experiments, sodium chloride crystals of sodium chloride Na and Cl ratio is 1:1, but not sodium chloride molecules. Organic compounds often have different compounds, with the same type of experiment. For example, benzene and acetylene-type experiments are CH. But they are based on molecular forms, can be obtained from the experimental type molecules, acetylene is C2H2 that benzene was C6H6.
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