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questions :What are transition elements? Discuss their position in the periodic table
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[Visitor (23.83.*.*)]answers [Chinese ]Time :2020-07-05
Transition element: It is a chemical element from Group IIIB to Group VIII in the periodic table. The common feature of these elements in the atomic structure is that the valence electrons are sequentially filled in the d-orbit of the outer layer. Therefore, sometimes people also include lanthanides and actinides as transition elements. In addition, group IB elements (copper, silver, gold) also use d electrons in the formation of 2 and 3 valent compounds; group ⅡB elements (zinc, cadmium, mercury) have the ability to form stable coordination compounds with traditional transition elements Similar, therefore, group IB and IIB elements are often included in transition elements.

Atomic configuration

The outermost layer has only 1~2 electrons

Color form

Silvery white or gray, with metallic luster

Melting point
Most transition elements are higher

Hardness density

Has greater hardness and density

Most refractory

Tungsten is the most refractory of all metals

Hardest

Chromium is the hardest of metals
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