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.
CROSSREFS
KEYWORD
nonn,fini,full,less
AUTHOR
Paul Curtz, May 05 2008
STATUS
approved