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Table 2 Properties of organic atom type singletons

From: PubChem atom environments

Atomic number Atomic symbol Number singletons Charge Valence
Minimum Maximum Minimum Maximum
1 H 166 −99 126 0 91
6 C 351 −99 291 0 254
7 N 111 −67 7 0 36
8 O 82 −94 123 0 50
9 F 16 −2 0 1 137
15 P 231 −99 55 0 233
16 S 169 −99 127 0 234
17 Cl 16 −2 5 0 64
35 Br 17 −3 1 0 8
53 I 56 −5 7 0 171
  1. Organic elements are used as examples.