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- D-block abstract "The d-block is the block or portion of the periodic table that contains the element groups 3–12. These groups correspond to the filling of the atomic d-orbital subshell of the second outermost shell (inside an outermost shell only containing 1 or 2 s-orbital electrons) with electron configurations ranging from s2d1 (Group 3) to s2d10 (Group 12). There are some irregularities in the sequence; for example Cr is s1d5 (not s2d4) and the Group 11 metals are s1d10 (not s2d9), so that the d-subshell is actually complete at Group 11.The d-block elements are often also known as transition metals or transition elements. However, the exact limits of the transition metal region are usually not considered to be identical to the d-block. Although some authors do identify the entire d-block (groups 3 to 12) as transition metals, most define transition metals as elements with partly filled d subshells either in the neutral atom or in ions in common oxidation states. This definition corresponds to including only Groups 3–11 as transition metals. Group 12 metals lack the characteristic chemical and physical properties associated with incomplete d subshells and are considered post-transition metals. Jensen has reviewed the historical usage of the terms transition element (or metal) and d-block. IUPAC allows both definitions.In the s-block and p-block of the periodic table, similar properties across the periods are generally not observed: the most important similarities tend to be vertical, down groups. However the d-block is notable in that horizontal similarities across the periods do become important.Although lutetium and lawrencium are in the d-block, they are not considered transition metals but a lanthanide and an actinide, respectively, according to IUPAC. Group 12 elements are also in the d-block but are sometimes considered post-transition metals as their d-subshell is completely filled.".
- D-block wikiPageID "70356".
- D-block wikiPageRevisionID "605642008".
- D-block hasPhotoCollection D-block.
- D-block subject Category:Blocks_in_the_periodic_table.
- D-block type Abstraction100002137.
- D-block type ChemicalElementGroups.
- D-block type Group100031264.
- D-block comment "The d-block is the block or portion of the periodic table that contains the element groups 3–12. These groups correspond to the filling of the atomic d-orbital subshell of the second outermost shell (inside an outermost shell only containing 1 or 2 s-orbital electrons) with electron configurations ranging from s2d1 (Group 3) to s2d10 (Group 12).".
- D-block label "Blok d".
- D-block label "D-block".
- D-block label "D-blok".
- D-block label "D-элементы".
- D-block label "Dブロック元素".
- D-block label "D区元素".
- D-block label "Elementos del bloque d".
- D-block label "Éléments du bloc d".
- D-block label "عناصر مستوى فرعي d".
- D-block sameAs Elementos_del_bloque_d.
- D-block sameAs D_bloke.
- D-block sameAs Éléments_du_bloc_d.
- D-block sameAs Dブロック元素.
- D-block sameAs D-구역.
- D-block sameAs D-blok.
- D-block sameAs Blok_d.
- D-block sameAs m.0lvkm.
- D-block sameAs Q214503.
- D-block sameAs Q214503.
- D-block sameAs D-block.
- D-block wasDerivedFrom D-block?oldid=605642008.
- D-block isPrimaryTopicOf D-block.