In chemistry, the term transition metal (sometimes also called a transition element) has two possible meanings:

• It commonly refers to any element in the d-block of the periodic table, including zinc, cadmium and mercury. This corresponds to groups 3 to 12 on the periodic table.

• More strictly, IUPAC defines a transition metal as "an element whose atom has an incomplete d sub-shell, or which can give rise to cations with an incomplete d sub-shell." By this definition, zinc, cadmium, and mercury are excluded from the transition metals, as they have a d¹⁰ configuration. Only a few transient species of these elements that leave ions with a partly filled d subshell have been formed, and mercury(I) only occurs as Hg₂^{2+, which does not strictly form a lone ion with a partly filled subshell, and hence these three elements are inconsistent with the latter definition.Cotton, F. Albert; Wilkinson, G.; Murillo, C. A. (1999). Advanced Inorganic Chemistry (6th ed.). New York: Wiley. They do form ions with a 2+ oxidation state, but these retain the 4d10 configuration. Element 112 may also be excluded although its oxidation properties are unlikely to be observed due to its radioactive nature. This definition corresponds to groups 3 to 11 on the periodic table.}

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Ignore transition metals
xghostie (paul claude) Thu, 05 Nov 2009 19:34:43 -0000
Ignore transition metals
New Books: Transition metals in the synthesis of complex organic molecules http://url4.eu/hDQc
miamiulibraries (Miami U. Libraries) Wed, 04 Nov 2009 15:22:25 -0000
New Books: Transition metals in the synthesis of complex organic molecules http://url4.eu/hDQc
im loving the ZXY because it makes me zexy! haha k transition metals now
meowimatiger (GNY) Tue, 03 Nov 2009 06:01:51 -0000
im loving the ZXY because it makes me zexy! haha k transition metals now
I'm in library now. Just fin 1 past yr paper of stats and now, revising transition metals. I have to finish the syllabus asap!!
thia_lyn (thia_lyn) Mon, 02 Nov 2009 06:33:29 -0000
I'm in library now. Just fin 1 past yr paper of stats and now, revising transition metals. I have to finish the syllabus asap!!
Got a f*cking headache.. Need to take a shower, have some pills, and memorize transition metals before going to bed..
invisible_tj (invisible_tj) Sun, 01 Nov 2009 14:50:09 -0000
Got a f*cking headache.. Need to take a shower, have some pills, and memorize transition metals before going to bed..
@Furtuim sweetest of the transition metals.
EditorialJoe (Least Rev. J Callan) Sat, 31 Oct 2009 21:47:00 -0000
@Furtuim sweetest of the transition metals.

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