transition element


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transition element

, metal
Chem any element belonging to one of three series of elements with atomic numbers between 21 and 30, 39 and 48, and 57 and 80. They have an incomplete penultimate electron shell and tend to exhibit more than one valency and to form complexes
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

transition element

[tran′zish·ən ‚el·ə·mənt]
(chemistry)
One of a group of metallic elements in which the members have the filling of the outermost shell to 8 electrons interrupted to bring the penultimate shell from 8 to 18 or 32 electrons; includes elements 21 through 29 (scandium through copper), 39 through 47 (yttrium through silver), 57 through 79 (lanthanum through gold), and all known elements from 89 (actinium) on. Also known as transition metal.
(electromagnetism)
An element used to couple one type of transmission system to another, as for coupling a coaxial line to a waveguide.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Such behavior is similar to the result obtained in [8, 9] for Ni and seems to be a generic feature for alloying with transition elements in dilute limit in general [39].
New Cr-Ni-Base Alloy for High-Temperature Applications Designed on the Basis of First Principles Calculations
Tralli, "A hybrid stress-assumed transition element for solid-to-beam and plate-to-beam connections," Computers & Structures, vol.
Multidimensional analysis of plates with irregularities using higher-order finite elements based on lobatto shape functions
This implies that if [[epsilon].sub.TP] is used for the transition element, the capacity will be overpredicted.
Applying the effectiveness-NTU method to elemental heat exchanger models
Potentially, predictions based on elasticities may be false, because the relationship between [lambda] and changes in transition elements is typically curvilinear (Boyce 1997; see also Caswell [1997]).
ELASTICITIES A REVIEW OF METHODS AND MODEL LIMITATIONS
(1994: 2412): "The condition that each loop should contain an element that is unique to that loop is not strict, If no unique element is present, the characteristic elasticity can be obtained by simple decomposition if the total number of loops in the population does not exceed the number of transition elements." Eq.
A graph theory approach to demographic loop analysis
The transition element containing the characteristic elasticity of the loop is given.
Loop analysis: evaluating life history pathways in population projection matrices
The magnetochemistry of transition elements provides grants to state whether the d electrons are paired or not.
Study of the Characterization of Amorphous Alloy [Co.sub.87][Nb.sub.46][B.sub.15]
Nickel is one of transition elements used to modify the titania surface.
Effects of synthesis Ni doped Ti[O.sub.2] on photocatalytic degradation process

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