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A199934
Extended d-block elements for Janet table.
3
21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 347
OFFSET
1,1
COMMENTS
After the s-block (A160914) and the p-block (A138469), we present the d-block (4*10) elements for the Janet table, in A167268. Janet published his table in a 1928 book (see below), 24 of planche 7, in which he also introduced the s, p, d, f blocks (called nappes 1, 2, 3, 4).
a(n) also comes from one of the two classical Mendeleyev-Moseley-Seaborg periodic table(s) i.e. (see A138096):
1 2
3 4 5 to 10
11 12 13 to 18
19 20 21 to 30 31 to 36
37 38 39 to 48 49 to 54
55 56 57 to 70 71 to 80 81 to 86
87 88 89 to 102 103 to 112 113 to 118.
(The second is in A134982).
REFERENCES
Charles Janet, Essais de classification hélicoidale des éléments chimiques, April 1928, N3, Beauvais, 2 + 104 pages, 4 leaflets (4 to 7).
CROSSREFS
Sequence in context: A165842 A183738 A004510 * A335558 A141439 A323419
KEYWORD
nonn,tabf
AUTHOR
Paul Curtz, Nov 12 2011
STATUS
approved