The Hill system is a system of writing chemical formulas such that the number of carbon atoms in a molecule is indicated first, the number of hydrogen atoms next, and then the number of all other chemical elements subsequently, in alphabetical order. When the formula contains no carbon, all the elements, including hydrogen, are listed alphabetically. This deterministic system enables straightforward sorting and searching of compounds.
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Famous quotes containing the words hill and/or system:
“The most interesting thing which I heard of, in this township of Hull, was an unfailing spring, whose locality was pointed out to me on the side of a distant hill, as I was panting along the shore, though I did not visit it. Perhaps, if I should go through Rome, it would be some spring on the Capitoline Hill I should remember the longest.”
—Henry David Thoreau (1817–1862)
“He could jazz up the map-reading class by having a full-size color photograph of Betty Grable in a bathing suit, with a co- ordinate grid system laid over it. The instructor could point to different parts of her and say, “Give me the co-ordinates.”... The Major could see every unit in the Army using his idea.... Hot dog!”
—Norman Mailer (b. 1923)