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- Q900739 subject Q6369308.
- Q900739 subject Q7058201.
- Q900739 abstract "The Hill system (or Hill notation) 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 of the chemical symbols. When the formula contains no carbon, all the elements, including hydrogen, are listed alphabetically.By sorting formulas according to the number of atoms of each element present in the formula according to these rules, with differences in earlier elements or numbers being treated as more significant than differences in any later element or number — like sorting text strings into lexicographical order — it is possible to collate chemical formulas into what is known as Hill system order. The Hill system was first published by Edwin A. Hill of the United States Patent and Trademark Office in 1900. It is the most commonly used system in chemical databases and printed indexes to sort lists of compounds.".
- Q900739 wikiPageExternalLink hillorder.htm.
- Q900739 wikiPageWikiLink Q102500.
- Q900739 wikiPageWikiLink Q10925.
- Q900739 wikiPageWikiLink Q11344.
- Q900739 wikiPageWikiLink Q11369.
- Q900739 wikiPageWikiLink Q1144915.
- Q900739 wikiPageWikiLink Q1459541.
- Q900739 wikiPageWikiLink Q14953108.
- Q900739 wikiPageWikiLink Q556.
- Q900739 wikiPageWikiLink Q623.
- Q900739 wikiPageWikiLink Q6369308.
- Q900739 wikiPageWikiLink Q7058201.
- Q900739 wikiPageWikiLink Q83147.
- Q900739 wikiPageWikiLink Q9121.
- Q900739 comment "The Hill system (or Hill notation) 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 of the chemical symbols.".
- Q900739 label "Hill system".