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A138228
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Atomic numbers at the top of the 18 groups of the Mendeleyev-Seaborg table A138724.
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0
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1, 4, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 5, 6, 7, 8, 9, 2
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| This refers to the following 18 elements at the top of their groups: H, Be, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, B, C, N, O, F, He.
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CROSSREFS
| Cf. A138718, A135559.
Sequence in context: A202450 A144292 A076943 * A133784 A041821 A042429
Adjacent sequences: A138225 A138226 A138227 * A138229 A138230 A138231
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KEYWORD
| nonn,fini,full,less
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), May 05 2008
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