A138040 Atomic number of the 2nd transition metal (group 4) in the n-th row of the periodic system of elements.

22, 40, 72, 104

Offset

4,1

Comments

Refers to Titanium=22, Zirconium=40, Hafnium=72, Rutherfordium=104.

Links

Table of n, a(n) for n=4..7.

Wikipedia, Periodic table

Crossrefs

Cf. A134984, A138724, A137575.

Sequence in context: A075217 A188156 A026061 * A154087 A063327 A066957

Adjacent sequences: A138037 A138038 A138039 * A138041 A138042 A138043

Keyword

nonn,fini,full,less

Author

Paul Curtz, May 02 2008

Extensions

Edited by R. J. Mathar, May 21 2009

Status

approved