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d-block

The d-block is a portion of the periodic table of the elements. The d-block contains those elements which have partially filled d-orbitals when in their ground states. The d-block elements are often also known as transition metals.

In the s-block and p-block of the periodic table, trends in properties across the periods are generally not observed: the most important trends tend to be vertically, down groups. However the d-block is notable in that horizontal trends 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.[1] Group 12 elements are also in the d-block but are considered post-transition metals[2] if their d-subshell is completely filled.[1]

Chemical elements in d-block
Group → 3 4 5 6 7 8 9 10 11 12
↓ Period
4 21
Sc
22
Ti
23
V
24
Cr
25
Mn
26
Fe
27
Co
28
Ni
29
Cu
30
Zn
5 39
Y
40
Zr
41
Nb
42
Mo
43
Tc
44
Ru
45
Rh
46
Pd
47
Ag
48
Cd
6 71
Lu
72
Hf
73
Ta
74
W
75
Re
76
Os
77
Ir
78
Pt
79
Au
80
Hg
7 103
Lr
104
Rf
105
Db
106
Sg
107
Bh
108
Hs
109
Mt
110
Ds
111
Rg
112
Cn

See also

Periodic table block

* Electron configuration

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