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A101649 Atomic numbers of the poor metals on the periodic table. 6


%S 13,31,49,50,81,82,83

%N Atomic numbers of the poor metals on the periodic table.

%C Elements 113, 114 and 115 are believed to be poor metals too. Element 116 could be either a poor metal or a metalloid. So I'm not putting the keyword full at this time. The poor metals are between the metalloids and the transition metals on the periodic table.

%D The New Encyclopaedia Britannica, 15th Edition, 1991, Volume 15 (Macropedia), Chemical Elements.

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Periodic_table">Periodic table</a>.

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Poor_metal">Poor metals</a>.

%e The atomic number of aluminium is 13.

%Y Cf. A099955, alkali metals; A099956, alkaline earth metals; A101648, metalloids; A101647, nonmetals (except halogens and noble gases); A097478, halogens; A018227, noble gases; A101649, poor metals.

%K fini,nonn

%O 0,1

%A Robert Happelberg (roberthappelberg(AT)yahoo.com), Dec 10 2004

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Last modified July 27 23:16 EDT 2021. Contains 346316 sequences. (Running on oeis4.)