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A249947 Number of available orbitals at increasing subshells in multi-electron atoms. 2
1, 1, 3, 1, 3, 1, 5, 3, 1, 5, 3, 1, 7, 5, 3, 1, 7, 5, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Follows electron configuration in a multi-electron atom, which is: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p. Each s subshell holds 1 orbital, each p holds 3 orbitals, each d holds 5 orbitals, and each f holds 7 orbitals.

Theoretically, the integers follow the pattern infinitely, but (conjecturally) the subshells stop after 7p, with 8s not existing as predicted.

LINKS

Table of n, a(n) for n=1..19.

ChemWiki, Electron configurations

ChemWiki, Quantum numbers

EXAMPLE

1s

2s 2p

3s 3p 3d

4s 4p 4d 4f

5s 5p 5d 5f

6s 6p 6d

7s 7p

(8s)

Read antidiagonals.

CROSSREFS

Cf. A167268.

Sequence in context: A309425 A218355 A103790 * A193583 A331731 A309891

Adjacent sequences:  A249944 A249945 A249946 * A249948 A249949 A249950

KEYWORD

nonn,full,fini

AUTHOR

Max Alweiss, Nov 08 2014

STATUS

approved

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Last modified September 17 16:50 EDT 2021. Contains 347487 sequences. (Running on oeis4.)