17th Group
-
Default:HF, HCl, HBr, HI, HAt
-
Molecules:
-
Neutral atoms: 1 bond is allowed.
Exceptions:-
3 valence:
-
Two of the ligands should be F, Cl or oxygen; and one more atom from the 14th, 15th, 16th columns.
-
Double bonded oxygen and one any other atom from 14th, 15th, 16th columns are also accepted.
-
-
5 valence:
-
Four of the ligands should be F, Cl or oxygen; and one more atom from the 14th, 15th, 16th columns. Double bonded oxygens are accepted.
-
-
7 valence:
-
IF7 is accepted.
-
-
Halogen oxoacids:
-
HXOy, where X = Cl, Br, I or At; and y = 2, 3 or 4.
-
-
-
-
Ions:
-
F-, Cl-, Br-, I-, At- are accepted.
-
1+ charged ions: 2 filled valences are necessary (bonds or radicals). If absent, implicit Hydrogen atoms added.
-
-
Radicals:
-
1 Radical with 0 bond around the halogen atom is accepted.
-