The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A138469 Atomic numbers of p-block elements. 5
 5, 6, 7, 8, 9, 10, 13, 14, 15, 16, 17, 18, 31, 32, 33, 34, 35, 36, 49, 50, 51, 52, 53, 54, 81, 82, 83, 84, 85, 86, 113, 114, 115, 116, 117, 118 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 6 X 6 square of orbital p filling elements in Mendeleyev-Seaborg or Janet-Tarantola periodic table. The sequence is considered full if we assume that all elements with 8 shells or more, i.e. of periods 8 and higher in Mendeleev's periodic table, have extremely unstable nuclei (extremely short half-life.) The atomic numbers of elements in each block are s-block: 1,2, 3,4, 11,12, 19,20, 37,38, 55,56, 87,88 for Mendeleev's periodic table (Cf. A160914) s-block: 1,2, 3,4, 11,12, 19,20, 37,38, 55,56, 87,88, 119,120 for Janet's periodic table (Cf. A160914) p-block: 5..10, 13..18, 31..36, 49..54, 81..86, 113..118 (Cf. A138469) d-block: 21..30, 39..48, 71..80, 103..112 (Cf. A199934) f-block: 57..70, 89..102 (Cf. A217923) LINKS OEIS Wiki, Periodic table CROSSREFS Cf. A130517, A131603, A167268. Cf. A160914 Atomic numbers of s-block elements. Cf. A138469 Atomic numbers of p-block elements. Cf. A199934 Atomic numbers of d-block elements. Cf. A217923 Atomic numbers of f-block elements. Sequence in context: A182306 A023379 A003667 * A089362 A333532 A121537 Adjacent sequences: A138466 A138467 A138468 * A138470 A138471 A138472 KEYWORD nonn,tabf,fini,full AUTHOR Paul Curtz, May 09 2008 EXTENSIONS Edited by Daniel Forgues, May 15 2011 Ref. to A160914 and A199934 inserted by Jean-François Alcover, Oct 15 2012 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 9 17:12 EST 2022. Contains 358702 sequences. (Running on oeis4.)