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transition element
NOUN [CHEMISTRY.]
1.
any element in any of the series of elements with atomic numbers 21–29, 39–47, 57–79, and 89–107, that in a given inner orbital has less than a full quota of electrons.
Source: Dictionary.com
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en.wikipedia.org/wiki/Transition_metal

In chemistry, the term transition metal (or transition element) has three possible meanings: The IUPAC definition defines a transition metal as "an element whose  ...

www.chemicalelements.com/groups/transition.html

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  ...

www.khanacademy.org/science/chemistry/periodic-table/copy-of-periodic-table-of-elements/v/periodic-table-transition-metals

The definition of a transition metal, and how to write the electron configuration including examples for Fe and Zn.

hyperphysics.phy-astr.gsu.edu/hbase/pertab/tranel.html

The transition elements are those elements having a partially filled d or f subshell in any common oxidation state. The term "transition elements" most commonly ...

chemed.chem.purdue.edu/genchem/topicreview/bp/ch12/trans.php

Position of Transition Metals in the Periodic Table. The elements in the periodic table are often divided into four categories: (1) main group elements, (2) ...

www.chemguide.co.uk/inorganic/transition/features.html

Explains what a transition metal is and looks at the general features of their chemistry.

www.britannica.com/science/transition-element

transition element: any of various chemical elements that have valence electrons —i.e., electrons that can participate in the formation of chemical bonds—in two ...

chem.libretexts.org/Textbook_Maps/General_Chemistry_Textbook_Maps/Map%3A_General_Chemistry_(Petrucci_et_al.)/23%3A_The_Transition_Elements/23.1%3A_General_Properties_of_Transition_Metals

Mar 21, 2017 ... Transition metals are defined as those elements that have (or readily form) partially filled d orbitals. The d-block elements in groups 3–11 are ...