Table 14.

Average unsigned errors in I.P.s for various sets of elements (eV)

Set of elements	No.	PM6	RM1	PM5	PM3	AM1
H, C, N, O	99	0.45	0.40	0.41	0.51	0.45
H, C, N, O, F, P, S, Cl, Br, I	229	0.47	0.41	0.44	0.51	0.56
Whole of main group	383	0.50		0.49	0.68	0.63
70 elements	385	0.50