Poor metal

From Wikipedia, the free encyclopedia

This article does not cite its references or sources.
You can help Wikipedia by introducing appropriate citations. This article has been tagged since November 2006.

The trivial name poor metals (or post-transition metals) is sometimes applied to the metallic elements of the p-block of the periodic table. They are more electropositive than the transition metals, but less so than the alkali metals and alkaline earth metals. Their melting and boiling points are generally lower than those of the transition metals, and they are also softer.

"Poor metals" is not a rigorous IUPAC-approved nomenclature, but the grouping is generally taken to include gallium, indium, tin, thallium, lead, bismuth and polonium; germanium and antimony are sometimes included (although these are also often considered as metalloids or "semi-metals"). Elements 113 to 116 (currently allocated the systematic names ununtrium, ununquadium, ununpentium and ununhexium) would likely exhibit properties characteristic of "poor metals", however as yet insufficient quantities of them have been synthesized to examine their chemistry.

13	14	15	16	17
B Boron	C Carbon	N Nitrogen	O Oxygen	F Fluorine
Al Aluminium	Si Silicon	P Phosphorus	S Sulphur	Cl Chlorine
Ga Gallium	Ge Germanium	As Arsenic	Se Selenium	Br Bromine
In Indium	Sn Tin	Sb Antimony	Te Tellurium	I Iodine
Tl Thallium	Pb Lead	Bi Bismuth	Po Polonium	At Astatine

[edit] See also

Periodic table

Periodic tables
Standard table \| Vertical table \| Table with names \| Names and atomic masses (large) \| Names and atomic masses (small) \| Names and atomic masses (text only) \| Inline F-block \| Elements to 218 \| Electron configurations \| Metals and nonmetals \| Table by blocks \| Alternatives
Lists of elements
Name \| Atomic symbol \| Atomic number \| Boiling point \| Melting point \| Density \| Atomic mass
Groups: 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18
Periods: 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9
Series: Alkalis - Alkaline earths - Lanthanides - Actinides - Transition metals - Poor metals - Metalloids - Nonmetals - Halogens - Noble gases
Blocks: s-block - p-block - d-block - f-block - g-block