A138228 Atomic numbers at the top of the 18 groups of the Mendeleyev-Seaborg table A138724.

1, 4, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 5, 6, 7, 8, 9, 2

Offset

0,2

Comments

This refers to the following 18 elements at the top of their groups: H, Be, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, B, C, N, O, F, He.

Links

Table of n, a(n) for n=0..17.

Crossrefs

Cf. A138718, A135559.

Sequence in context: A329404 A370979 A076943 * A303722 A305225 A272954

Adjacent sequences: A138225 A138226 A138227 * A138229 A138230 A138231

Keyword

nonn,fini,full,less

Author

Paul Curtz, May 05 2008

Status

approved