Table 9.

Average unsigned errors in ionization potential (eV)

Element	PM6	No.	PM5	No.	PM3	No.	AM1	No.
Hydrogen	0.43	226	0.40	226	0.60	226	0.52	217
Lithium	0.89	12	0.88	12	1.29	12	0.59	12
Beryllium	0.52	7	0.29	7	0.93	7	0.45	7
Boron	0.31	11	0.34	11	1.01	11	–	–
Carbon	0.41	230	0.39	230	0.54	230	0.54	227
Nitrogen	0.55	43	0.45	43	0.53	43	0.48	42
Oxygen	0.62	72	0.56	72	0.63	72	0.69	69
Fluorine	0.64	67	0.65	67	0.74	67	0.85	65
Sodium	0.34	5	0.34	5	1.43	5	0.51	4
Magnesium	0.97	4	1.05	4	1.10	4	1.41	4
Aluminum	0.62	3	0.29	3	0.40	3	0.69	3
Silicon	0.43	11	0.81	11	0.70	11	0.68	11
Phosphorus	0.49	13	0.47	13	0.64	13	0.56	13
Sulfur	0.52	46	0.51	46	0.48	46	0.62	46
Chlorine	0.48	62	0.58	62	0.57	60	0.61	57
Potassium	0.23	4	0.50	4	0.54	4	0.34	3
Calcium	0.74	1	1.24	1	0.52	1	0.41	1
Scandium	3.73	1	–	–	–	–	–	–
Titanium	0.09	1	–	–	–	–	–	–
Zinc	0.32	5	0.35	5	0.99	5	0.49	5
Gallium	0.52	3	0.73	3	1.28	3	1.16	3
Germanium	0.70	13	0.49	13	0.93	13	1.05	13
Arsenic	0.69	5	0.31	5	0.62	5	0.79	5
Selenium	0.38	10	0.29	10	0.47	10	1.22	10
Bromine	0.28	33	0.39	33	1.20	33	0.49	32
Rubidium	0.18	3	0.39	3	0.93	3	0.22	3
Strontium	0.63	1	0.38	1	0.14	1	0.26	1
Cadmium	0.33	5	0.46	5	0.39	5	–	–
Indium	0.63	2	0.86	2	2.06	2	0.83	2
Tin	0.70	14	0.48	14	1.22	14	0.44	14
Antimony	0.44	5	0.90	5	1.16	5	0.54	5
Tellurium	0.43	3	0.20	3	0.25	3	0.70	3
Iodine	0.47	29	0.46	29	0.48	29	0.89	29
Cesium	0.58	4	0.71	4	1.37	4	1.11	4
Barium	0.08	1	0.97	1	0.08	1	0.75	1
Mercury	0.51	12	0.43	12	0.74	12	0.49	12
Thallium	0.30	3	0.46	3	0.80	3	0.53	3
Lead	0.56	13	0.47	13	0.93	13	0.65	13
Bismuth	0.98	5	1.28	5	0.72	5	1.66	5