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Topic: Transition Elements

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	Transition metal - Wikipedia, the free encyclopedia
		However, many interesting properties of the transition elements as a group are the result of their ability to contribute valence electrons from s orbitals before d orbitals, a property which all members of the d-block except zinc and scandium share, so the more restricted definition is in many contexts the more useful.
		The (loosely defined) transition metals are the forty chemical elements 21 to 30, 39 to 48, 71 to 80, and 103 to 112.
		However elements in higher oxidation states are usually bonded covalently to electronegative compounds such as O or F, often as a polyatomic ion such as chromate, vanadate, and permanganate ions.
	en.wikipedia.org /wiki/Transition_metal (1396 words)

	AllRefer.com - transition elements, Compound & Element (Compounds And Elements) - Encyclopedia
		transition elements or transition metals, in chemistry, group of elements characterized by the filling of an inner d electron orbital as atomic number increases.
		In the elements of the lanthanide series and the actinide series the inner f orbital is filled as atomic number increases; those elements are often called the inner transition elements.
		The study of the complex ions and compounds formed by transition metals is an important branch of chemistry.
	reference.allrefer.com /encyclopedia/T/transelem.html (267 words)

	Transition metal -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-11-04)
		The name transition comes from their position in the (A tabular arrangement of the chemical elements according to atomic number as based on the periodic law) periodic table of elements.
		Compared to Group II elements such as (A white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals) calcium, transition elements form ions with a wide variety of oxidation states.
		However a transition element like (A soft silvery white toxic metallic element used in steel alloys; it occurs in several complex minerals including carnotite and vanadinite) vanadium has roughly linear increasing ionisation enthalpies throughout its s and d orbitals, due to the close energy difference between the 3d and 4s orbitals.
	www.absoluteastronomy.com /encyclopedia/t/tr/transition_metal.htm (1406 words)

	Transition Elements
		The next ten elements do not show the gradation in properties of previous periods: they are remarkably similar to one another in their properties and are all metals.
		La- Hg The reason for the similarity of the first transition series is that, considering the series from left to right, while each additional electron is entering the 3d shell, the chemistry of the elements continues to be determined largely by the 4s electrons.
		The spatial arrangement of bonds from the ligands to the central atom or ion depends on the identity of the atomic orbitals used by the central atom or ion and on the coordination number of the transition element.
	home.freeuk.net /concord2/Transition_elements/Transition_Elements_notes.htm (3300 words)

	The Transition Metals (Site not responding. Last check: 2007-11-04)
		The Transition Metals are the elements found between the Group IIA Elements and the Group IIB Elements in the periodic table.
		The Sub-Group VIb Elements are Chromium, Molybdenum and Tungsten.
		The inner transition elements are found between Group 2 and the transition elements in the fifth row of the periodic table.
	www.ucc.ie /ucc/depts/chem/dolchem/html/comp/transmet.html (1602 words)

	Transition metal (Site not responding. Last check: 2007-11-04)
		This name comes from their position in the periodic table of elements, which represent the successive addition of electrons to the d atomic orbitals of the atoms as one progresses through each of the three periods.
		Transition elements are chemically defined as elements which form at least one ion with a partially filled subshell of d electrons.
		However elements in higher oxidation states are usually bonded covalently to electronegative compounds such as O or F, often in an anion.
	www.termsdefined.net /tr/transition-metal.html (1082 words)

	College Papers-Transition Elements (Site not responding. Last check: 2007-11-04)
		The transition elements are commonly defined as the 30 elements with atomic numbers 21 to 30, 39 to 48, and 71 to 80.
		Several transition elements and their compounds are important catalysts (see Catalysis) in a variety of industrial processes, especially in the manufacture of petroleum and plastic products, where organic molecules are hydrogenated, oxidized, or polymerized (see Chemical Reaction; Hydrogenation; Polymer).
		Molecules containing transition elements are important to the biochemical processes in many living systems, the most familiar example of which is the iron-containing heme complex of hemoglobin, which is responsible for oxygen transport in the blood of all vertebrates and some invertebrates.
	www.college-papers.org /free_essays/chemistry/transition-elementsmnn.html (422 words)

	Chemical Elements.com - Transition Metals
		The 38 elements in groups 3 through 12 of the periodic table are called "transition metals".
		As with all metals, the transition elements are both ductile and malleable, and conduct electricity and heat.
		The interesting thing about transition metals is that their valence electrons, or the electrons they use to combine with other elements, are present in more than one shell.
	www.chemicalelements.com /groups/transition.html (110 words)

	Transition Elements (Site not responding. Last check: 2007-11-04)
		The transition elements are those elements having a partially filled d or f subshell in any common oxidation state.
		The 2B elements zinc, cadmium and mercury do not strictly meet the defining properties, but are usually included with the transition elements because of their similar properties.
		The f-block transition elements are sometimes known as "inner transition elements".
	hyperphysics.phy-astr.gsu.edu /hbase/pertab/tranel.html (134 words)

	transition element -- Encyclopædia Britannica
		While the term transition has no particular chemical significance, it is a convenient name by which to distinguish the similarity of the atomic structures and resulting properties of the elements so designated.
		The most abundant transition element in the Earth's solid crust is iron, which is fourth among all elements and second (to aluminum) among metals in crustal abundance.
		The metallic element cobalt is one of the transition elements, closely related to iron and nickel.
	www.britannica.com /eb/article-9110614?tocId=9110614&query=transition (890 words)

	The SMIL 2.0 Transition Effects Module
		Transitions specified with a transOut attribute will end at the end of the media element's active duration or end at the end of the element's fill state if a non-default fill value is applied.
		The active duration for the media element to be transitioned to (the destination media) must either overlap the active duration or the fill state for the media element to be transitioned from (the background).
		Note that the transitionFilter element represents an "in" transition in the sense that the destination media (the media that is fully visible when progress is 1.0) is the media to which the transition is applied (the parent media, in this case).
	www.w3.org /TR/2005/REC-SMIL2-20050107/smil-transitions.html (8594 words)

	Transition Elements (Site not responding. Last check: 2007-11-04)
		Transition metals are strictly defined as elements with one or more stable ions which have incompletely filled d-orbitals.
		The absorption of light by transition metals compounds is due to the presence of unpaired d electrons in the ions.
		Transition metals are therefore easily oxidised and reduced and are useful as redox catalysts.
	www.teachmetuition.co.uk /Chemistry/Transition_Metals/transition_elements.htm (1080 words)

	Chem4Kids.com: Elements & Periodic Table
		Elements are the building blocks of all matter.
		Sure, they are smaller than the atoms of an element, but only when they group with other quarks do they form atoms that have recognizable traits.
		Those transition metals have electron configurations that are a little different from the first 18.
	www.chem4kids.com /files/elem_intro.html (332 words)

	The post transition elements (Site not responding. Last check: 2007-11-04)
		The tendency for post transition elements to exhibit two stable oxidation states, one equal to the units digit of the group number and the other two less than that, is due to the
		Because of the d-block contraction, the post transition elements of period four are about the same size as their period three congeners.
		Similarly, the occurrence of the f-block elements between the period six s- and p-blocks causes the period six p-block elements to be about the same size as their period five congeners.
	facultyfp.salisbury.edu /dfrieck/htdocs/212/elements/group13/group13.htm (467 words)

	The SMIL 2.1 Transition Effects Module
		The transition behaviors operate within the active duration of their respective media elements. The behavior of multiple simultaneous transitions active on an element at a time is undefined.
		As with the visual "fade" transition the direction of the transition depends on whether it is used in transIn or transOut attribute.
		A transOut transition is from a set of media items visible at the start time of the transition to the set of media items that should be visible just after the master media item finishes (note that this set does not depend on whether transOut is specified or not).
	www.w3.org /TR/SMIL2/smil-transitions.html (9200 words)

	Transition Metal Chemistry (Site not responding. Last check: 2007-11-04)
		The elements in the periodic table are often divided into four categories: (1) main group elements, (2) transition metals, (3) lanthanides, and (4) actinides.
		The transition metals are the metallic elements that serve as a bridge, or transition, between the two sides of the table.
		Transition metals are like main group metals in many ways: They look like metals, they are malleable and ductile, they conduct heat and electricity, and they form positive ions.
	chemed.chem.purdue.edu /genchem/topicreview/bp/ch12/transframe.html (966 words)

	[No title]
		The transition elements are some of the most widely used and most common elements on the periodic table, and include iron, copper, silver, and gold.
		The physical and chemical properties of the transition elements are, in many ways, very different from the physical and chemical properties of the alkali and alkaline earth metals.
		Moving left to right across the first transition series, however, there is a general trend towards an increase in atomic radius in the first half of the series, amd in the latter half of the series atomic radius remains relatively constant.
	www.uncp.edu /home/mcclurem/ptable/transelm.html (650 words)

	Chem4Kids.com: Elements & Periodic Table: Transition Metals
		Transition metals are able to put more than eight electrons in the shell that is one in from the outermost shell.
		The transition metals are able to put up to 32 electrons in their second to last shell.
		As you learn more, you will discover that most transition elements actually have two shells that are not happy.
	www.chem4kids.com /files/elem_transmetal.html (309 words)

	Atomic ORME and S-ORME States of the Transition Group Elements
		Researchers have theorized that when the nucleus of a transition group element is superdeformed and in the high spin state, a positive "screening potential" around the nucleus (the positive field produced by the nucleus that screens all but the valence electrons) expands out and covers all of the electrons of the element.
		To resume, the transition group elements with their superdeformed "soft" nuclei all resonating to a single frequency, in their high spin low energy state, becoming a wave flow of light in a resonant unified entity, are a resonance coupled system of quantum oscillators, harmonically coupled in two dimensions.
		Hudson discovered that the precious elements, in the group of transitional elements, could be found in a monoatomic form in certain ores and that by a chemical method, he could separate them out from these ores.
	www.hbci.com /~wenonah/new/hudson.htm (3901 words)

	transition elements
		transition elements or transition metals,in chemistry, group of elements characterized by the filling of an inner
		Many of the chemical and physical properties of the transition elements are due to their unfilled
		Human element is key to an IS transition, seminar told.
	www.infoplease.com /ce6/sci/A0849276.html (240 words)

	Uses of the Transition Metals
		Manganese is the 12th most abundant element, and the third most abundant transition element at 0.106% (1060 PPM) of the earth's crust.
		Iron is the 4th most abundant element at 6.2% (62000 PPM) after oxygen, silicon, and aluminium, making it the commonest transition metal, and it is one of the most important elements.
		Nickel is the seventh most abundant transition metal and 22nd most abundant element at 99 PPM Over a quarter of the world production of Ni comes from the Sudbury Basin in Canada, a giant meteor crater measuring 17 by 37 miles.
	www.sky-web.pwp.blueyonder.co.uk /Science/TransMetalUses.htm (1378 words)

	transition elements on Encyclopedia.com
		Role of the state as a salient stakeholder in a transition economy: the case of Egypt.
		The poverty of strategy: E.P. Thompson, Perry Anderson, and the transition to socialism.
		Addressing transition to adult health care for adolescents with special health care needs.
	www.encyclopedia.com /html/t1/transelem.asp (440 words)

	A2 unit trends and patterns transition elements page
		A transition metal is a d-block element that has at least one ion with a partially filled d-orbital.
		This is why it is very important to include roman numerals in the compound's name to indicate the oxidation state of the transition element.
		Many transition metals are useful as catalysts for industrial reactions, either as the metal or in compounds.
	www.rjclarkson.demon.co.uk /tandp/transitionelements.htm (664 words)

	Transition Metals
		These are metals, they live in the d-block of the periodic table, between the s and p blocks.
		A transition element (d-block) has at least one ion with a partly filled d orbital.
		Although these are in the d-block, they are not transition elements.
	www.webchem.net /notes/A2/tp/transition_metals.htm (242 words)

	MSN Encarta - Search Results - Transition Elements
		Transition Elements, Cadmium, Chromium, Cobalt (element), Copper (element), Gold, Hafnium, Iridium, Iron, Manganese, Mercury (element),...
		[−325−8]Calculate the difference of the products of the elements on the two diagonals.
		Exclusively for MSN Encarta Premium Subscribers--quickly search thousands of articles from magazines such as Time, Newsweek, The Atlantic Monthly, and Smithsonian.
	ca.encarta.msn.com /Transition_Elements.html (139 words)

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