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

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 ?
Woo, "Interlaminar stress distribution of laminated composites using the mixed-dimensional transition element," Journal of Composite Materials, vol.
The first transition element is used to couple two regular cubic elements onto one of the faces of the transition element, while the latter is used in 1-irregular mesh.
Application of the Effectiveness Equation to the Transition Element
Elasticities (proportional sensitivities) quantify the relative changes in population growth rate resulting from small relative changes in the matrix transition elements.
4) The loop elasticity is given by its characteristic elasticity multiplied by the number of transition elements that the loop contains.
In the presence of other self-loops, note first that if we apply Property 1 to a node i that has a transition element [a.
The transition elements will feature developing the urban facades and walls of modern buildings surrounding the urban area and the tourism pathway.
We therefore turn attention to the transition elements, or transition metals, which Wald mentions in passing.
Between individual aerial pieces, choreographed dance and other circus routines on the ground will act as transition elements.
They are researching the effects of different developer/bleach combinations on non-planar silver halide sensitized gelatin (SHSG), aiming to create a panchromatic DCG-type material using the different electron levels of certain transition elements.
Many of these elemental species, such as alkalis and transition elements, can damage devices.
4) the transition elements are eluted to the detector via nitric acid; during this process, the resin is converted to the hydronium ion form;

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