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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 (list; table; graph; refs; listen; history; text; internal format)
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).

LINKS

Table of n, a(n) for n=1..71.

Wikipedia, The Janet periodic table

CROSSREFS

Sequence in context: A165842 A183738 A004510 * A335558 A141439 A323419

Adjacent sequences:  A199931 A199932 A199933 * A199935 A199936 A199937

KEYWORD

nonn,tabl

AUTHOR

Paul Curtz, Nov 12 2011

STATUS

approved

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Last modified July 28 23:07 EDT 2021. Contains 346340 sequences. (Running on oeis4.)