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A101649 Atomic numbers of the poor metals on the periodic table. 6
13, 31, 49, 50, 81, 82, 83 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

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.

REFERENCES

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

LINKS

Table of n, a(n) for n=0..6.

Wikipedia, Periodic table.

Wikipedia, Poor metals.

EXAMPLE

The atomic number of aluminium is 13.

CROSSREFS

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.

Sequence in context: A100589 A111489 A106294 * A063305 A301622 A166143

Adjacent sequences:  A101646 A101647 A101648 * A101650 A101651 A101652

KEYWORD

fini,nonn

AUTHOR

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

STATUS

approved

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Last modified November 18 09:55 EST 2019. Contains 329261 sequences. (Running on oeis4.)