Electron Number (EN) element selection

You can plot EN grids for individual elements by selecting a single element, or all the elements in a group by selecting the group number, or all the elements in a period by selecting the period number. Further down the page a number of other sets of elements sometimes used when exploring periodicity are available.

This page displays two layout variants of the periodic table. The first is a standard periodic table and the second is a chemical periodic table based based upon empirical structural data within this Chemdex database. The group (1➝18) labelling is the IUPAC numbering system. The group (G17←G0) labelling is a numbering system decreasing from G17 to G0 denoting the number of electrons required from attached groups to achieve the 8- (octet) or 18-electron counts often associated with p- or d-block compounds.

Standard periodic table

Explore Electron Number (EN) periodic trends for compounds of the elements through this periodic table.
Group (1➝18)➝ 1 2   3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Group (G17←G0) G17 G16   G15 G14 G13 G12 G11 G10 G9 G8 G7 G6 G5 G4 G3 G2 G1 G0
 
Period
P1 1
H
2
He
P2 3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
P3 11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
P4 19
K
20
Ca
21
Sc
22
Ti
23
V
24
Cr
25
Mn
26
Fe
27
Co
28
Ni
29
Cu
30
Zn
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
P5 37
Rb
38
Sr
39
Y
40
Zr
41
Nb
42
Mo
43
Tc
44
Ru
45
Rh
46
Pd
47
Ag
48
Cd
49
In
50
Sn
51
Sb
52
Te
53
I
54
Xe
P6 55
Cs
56
Ba
* 71
Lu
72
Hf
73
Ta
74
W
75
Re
76
Os
77
Ir
78
Pt
79
Au
80
Hg
81
Tl
82
Pb
83
Bi
84
Po
85
At
86
Rn
P7 87
Fr
88
Ra
** 103
Lr
104
Rf
105
Db
106
Sg
107
Bh
108
Hs
109
Mt
110
Ds
111
Rg
112
Cn
113
Nh
114
Fl
115
Mc
116
Lv
117
Ts
118
Og
           
Lanthanoids (P6) * 57
La
58
Ce
59
Pr
60
Nd
61
Pm
62
Sm
63
Eu
64
Gd
65
Tb
66
Dy
67
Ho
68
Er
69
Tm
70
Yb
Actinoids (P7) ** 89
Ac
90
Th
91
Pa
92
U
93
Np
94
Pu
95
Am
96
Cm
97
Bk
98
Cf
99
Es
100
Fm
101
Md
102
No

Chemical periodic table

Explore Electron Number (EN) trends for compounds of the elements through this periodic table.
Group (17←0)➝ G17 G16   G15 G14 G13 G12 G11 G10 G9 G8 G7 G6 G5 G4 G3 G2 G1 G0
Group (1➝18)➝ 1 2   3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
 
Period
P1 1
H
2
He
P2 3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
P3 11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
P4 19
K
20
Ca
21
Sc
22
Ti
23
V
24
Cr
25
Mn
26
Fe
27
Co
28
Ni
29
Cu
30
Zn
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
P5 37
Rb
38
Sr
39
Y
40
Zr
41
Nb
42
Mo
43
Tc
44
Ru
45
Rh
46
Pd
47
Ag
48
Cd
49
In
50
Sn
51
Sb
52
Te
53
I
54
Xe
P6 55
Cs
56
Ba
* 71
Lu
72
Hf
73
Ta
74
W
75
Re
76
Os
77
Ir
78
Pt
79
Au
80
Hg
81
Tl
82
Pb
83
Bi
84
Po
85
At
86
Rn
P7 87
Fr
88
Ra
89
Ac
90
Th
91
Pa
92
U
93
Np
94
Pu
95
Am
**
P7 103
Lr
104
Rf
105
Db
106
Sg
107
Bh
108
Hs
109
Mt
110
Ds
111
Rg
112
Cn
113
Nh
114
Fl
115
Mc
116
Lv
117
Ts
118
Og
 
Lanthanoids (P6) * 57
La
58
Ce
59
Pr
60
Nd
61
Pm
62
Sm
63
Eu
64
Gd
65
Tb
66
Dy
67
Ho
68
Er
69
Tm
70
Yb
Actinoids (P7) ** 96
Cm
97
Bk
98
Cf
99
Es
100
Fm
101
Md
102
No

Other element selections

Here are some other sets of elements that you might want to try. These are selected to help you evaluate suggestions regarding alternative locations of some elements in the periodic table and also other relationships referred to as "diagonal" relationships and "knight's move" relationships.