A192409 Number of letters in the English name of the n-th element in the periodic table of the elements.
8, 6, 7, 9, 5, 6, 8, 6, 8, 4, 6, 9, 9, 7, 10, 6, 8, 5, 9, 7, 8, 8, 8, 8, 9, 4, 6, 6, 6, 4, 7, 9, 7, 8, 7, 7, 8, 9, 7, 9, 7, 10, 10, 9, 7, 9, 6, 7, 6, 3, 8, 9, 6, 5, 7, 6, 9, 6, 12, 9, 10, 8, 8, 10, 7, 10, 7, 6, 7, 9, 8, 7, 8, 8, 7, 6, 7, 8, 4, 7, 8, 4, 7, 8, 8, 5, 8, 6, 8, 7, 12, 7, 9, 9, 9, 6, 9, 11, 11, 7, 11, 8, 10, 13, 7, 10, 7, 7, 10, 12, 11, 11, 8, 9, 9, 11, 10, 9
Offset: 1
Examples
a(1) = 8, because HYDROGEN uses 8 letters. a(2) = 6, because HELIUM uses 6 letters. a(3) = 7, because LITHIUM uses 7 letters. and so on. Note that a(13) = 9, not 8, since the IUPAC spellings are used.
Links
- International Union of Pure and Applied Chemistry, Periodic Table of Elements
- Herbert Kaesz, The synthesis and naming of elements 110 and beyond Chemistry International 24:2 (2002), p. 7.
- W. H. Koppenol, Naming of new elements, Pure and Applied Chemistry 74:5 (2002), pp. 787-791.
- Wikipedia, Periodic table
Crossrefs
Programs
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Mathematica
Length @ Characters @ ElementData[#, "Name"] & /@ Range[118] (* Amiram Eldar, Jan 25 2020, generates all the terms in the data section with two exceptions: a(13) assumes the name "Aluminum" instead of "Aluminium" and a(55) assumes the name "Cesium" instead of "Caesium" *)
Extensions
a(7), a(32), a(35) corrected and a(51)-a(118) added by Andrew Howroyd, Jan 24 2020
Comments