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%I #7 Jun 19 2014 11:59:27
%S 3,4,11,12,13,19,20,37,38,55,56,87,88
%N Atomic numbers of the pre-transition metals.
%C Aluminium (Z = 13) is referred to as a pre-transition metal, along with the group 1 alkali metals (A099955) and group 2 alkaline earth metals (A099956).
%D P. A. Cox, Instant Notes; Inorganic Chemistry, 2nd edition, Taylor & Francis, 2004, pp. 188-189.
%Y Cf. A099955, A099956.
%K nonn,fini,full
%O 1,1
%A _Arkadiusz Wesolowski_, Jun 17 2014