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A099956 Atomic numbers of the alkaline earth metals. 9

%I

%S 4,12,20,38,56,88

%N Atomic numbers of the alkaline earth metals.

%e 12 is the atomic number of magnesium.

%Y Cf. A099955, alkali metals; A101648, metalloids; A101647, nonmetals (except halogens and noble gases); A097478, halogens; A018227, noble gases; A101649, poor metals.

%K nonn,fini,full

%O 1,1

%A _Parthasarathy Nambi_, Nov 12 2004

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Last modified June 24 12:30 EDT 2021. Contains 345416 sequences. (Running on oeis4.)