Chemistry Reference
In-Depth Information
TABLE 2.5
Electron Configuration of the Atoms of Elements in the d-Block
Period
Group
4
5
6
3
Sc
[Ar]3d
1
4s
2
Y
[Kr]4d
1
5s
2
La
[Xe]5d
1
6s
2
4
Ti
[Ar]3d
2
4s
2
Zr
[Kr]4d
2
5s
2
Hf
[Xe]4f
14
5d
2
6s
2
5
V
[Ar]3d
3
4s
2
Nb
[Kr]4d
4
5s
1
Ta
[Xe]4f
14
5d
3
6s
2
6
Cr
[Ar]3d
5
4s
1
Mo
[Kr]4d
5
5s
1
W
[Xe]4f
14
5d
4
6s
2
7
Mn
[Ar]3d
5
4s
2
Tc
[Kr]4d
5
5s
2
Re
[Xe]4f
14
5d
5
6s
2
8
Fe
[Ar]3d
6
4s
2
Ru
[Kr]4d
7
5s
1
Os
[Xe]4f
14
5d
6
6s
2
9
Co
[Ar]3d
7
4s
2
Rh
[Kr]3d
8
4s
1
Ir
[Xe]4f
14
5d
7
6s
2
10
Ni
[Ar]3d
8
4s
2
Pd
[Kr]4d
10
5s
0
Pt
[Xe]4f
14
5d
9
6s
1
11
Cu
[Ar]3d
10
4s
1
Ag
[Kr]4d
10
5s
1
Au
[Xe]4f
14
5d
10
6s
1
12
Zn
[Ar]3d
10
4s
2
Cd
[Kr]4d
10
5s
2
Hg
[Xe]4f
14
5d
10
6s
2
TABLE 2.6
Electron Configuration of the Atoms of the Elements
in the f-Block
Period
6
7
Ce
[Xe]4f
1
5d
1
6s
2
Th
[Rn]5f
0
6d
2
7s
2
Pr
[Xe]4f
3
5d
0
6s
2
Pa
[Rn]5f
2
6d
1
7s
2
Nd
[Xe]4f
4
5d
0
6s
2
U
[Rn]5f
3
6d
1
7s
2
Pm
[Xe]4f
5
5d
0
6s
2
Np
[Rn]5f
4
6d
1
7s
2
Sm
[Xe]4f
6
5d
0
6s
2
Pu
[Rn]5f
6
6d
0
7s
2
Eu
[Xe]4f
7
5d
0
6s
2
Am
[Rn]5f
7
6d
0
7s
2
Gd
[Xe]4f
7
5d
1
6s
2
Cm
[Rn]5f
7
6d
1
7s
2
Tb
[Xe]4f
9
5d
0
6s
2
Bk
[Rn]5f
9
6d
0
7s
2
Dy
[Xe]4f
10
5d
0
6s
2
Cf
[Rn]5f
10
6d
0
7s
2
Ho
[Xe]4f
11
5d
0
6s
2
Es
[Rn]5f
11
6d
0
7s
2
Er
[Xe]4f
12
5d
0
6s
2
Fm
[Rn]5f
12
6d
0
7s
2
Tm
[Xe]4f
13
5d
0
6s
2
Md
[Rn]5f
13
6d
0
7s
2
Yb
[Xe]4f
14
5d
0
6s
2
No
[Rn]5f
14
6d
0
7s
2
Lu
[Xe]4f
14
5d
1
6s
2
Lr
[Rn]5f
14
6s
1
7s
2
the calculated reducing power would decrease according to the order: Cs > Rb > K
> Na > Ba > Li > Sr > Ca > Mg > Be. These two series coincide if lithium and sodium
are excluded.
Group 13 (III A) includes boron (a metalloid) that has a nonmetal behavior, and
aluminum, gallium, indium and thallium (poormetals). These elements have lower
