A080915 Number of electrons in outermost electron shell (valence electrons) in chemical element number n.

1, 2, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 2, 2, 1, 1, 2, 1, 1, 10, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2

Offset

0,2

Links

Table of n, a(n) for n=0..97.

C. Heilman, The Pictorial Periodic Table

Example

Example: element 46Pd has ten electrons in its N-shell, none in its O-shell.

Crossrefs

Cf. A080916.

Sequence in context: A220661 A369900 A137846 * A239484 A058714 A057045

Adjacent sequences: A080912 A080913 A080914 * A080916 A080917 A080918

Keyword

nonn

Author

Ralf Stephan, Feb 23 2003

Status

approved