transition element


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

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

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.
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].
Tralli, "A hybrid stress-assumed transition element for solid-to-beam and plate-to-beam connections," Computers & Structures, vol.
Later, an octree meshing technique is described with the utilization of transition elements. Two examples of transition elements are shown for the new VHE elements.
This implies that if [[epsilon].sub.TP] is used for the transition element, the capacity will be overpredicted.
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]).
(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.
With transition element incorporation, the magnetic properties of these QDs can also be tuned.
The transition element containing the characteristic elasticity of the loop is given.
The magnetochemistry of transition elements provides grants to state whether the d electrons are paired or not.
These documents, he said, will define additional terms and transition elements within the accession procedure.
Nickel is one of transition elements used to modify the titania surface.
Among the transition elements, Mn shows the maximum magnetic behaviors with electron effective mass ~0.3[m.sub.e] ([m.sub.e] = free electron mass); a doping of Mn into the ZnO semiconductor host lattice may result in large injected spins and carrier which make it suitable to be applied as diluted magnetic semiconductor (DMSs) [4].

Full browser ?