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:
“Tawny are the leaves turned, but they still hold.
It is the harvest; what shall this land produce?
A meager hill of kernels, a runnel of juice.
Declension looks from our land, it is old.”
—John Crowe Ransom (1888–1974)
“As long as learning is connected with earning, as long as certain jobs can only be reached through exams, so long must we take this examination system seriously. If another ladder to employment was contrived, much so-called education would disappear, and no one would be a penny the stupider.”
—E.M. (Edward Morgan)