1.7 APPENDIX CONCEPTOR identification numbers for atoms types.

Atom	Code		Atom	Code
C sp3	1		N sp2	10
C sp2	2		N sp	11
C sp2 (Carbonyl)	3		F	12
C sp2 (Aromatic)	4		Cl	13
C sp	5		Br	14
O sp3	6		I	15
O sp2	7		S (bivalent, sp3)	16
H	8		S (Sulphone/-oxide)	17
N sp3	9		N (Nitro)	18