A249947 Number of available orbitals at increasing subshells in multi-electron atoms.

1, 1, 3, 1, 3, 1, 5, 3, 1, 5, 3, 1, 7, 5, 3, 1, 7, 5, 3

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