Chemistry Nexus

by WebElements: the periodic table on the web

The Janet periodic table is an excellent alternative periodic table and organises elements according to atomic orbital filling. Therefore, hydrogen is above lithium on the grounds they are both ns1, and helium above beryllium on the grounds they are both ns2. Current Group numbers are displayed to help orientation with the standard table.

Group 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 1 2
Period
1
1
2
1
3
4
2
5
6
7
8
9
10
11
12
3
13
14
15
16
17
18
19
20
4
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
5
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
6
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
7
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
Uue
120
Ubn