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A6: Atomic Ionization Energies

Last updated

Feb 15, 2024
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- A5: Dipole Moments
- A7: Electron Affinities

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Ionization energy is the quantity of energy that an isolated, gaseous atom in the ground electronic state must absorb to discharge an electron, resulting in a gaseous cation.

$H(g) \rightarrow H^+(g) + e^-$

These tables list values of molar ionization energies, measured in kJ mol^-1.

At#	sym	1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th
1	H	1312.
2	He	2372.3	5250.5
3	Li	520.2	7298.1	11815.0
4	Be	899.5	1757.1	14848.7	21006.6
5	B	800.6	2427.1	3659.7	25025.8	32826.7
6	C	1086.5	2352.6	4620.5	6222.7	37831	47277.0
7	N	1402.3	2856	4578.1	7475.0	9444.9	53266.6	64360
8	O	1313.9	3388.3	5300.5	7469.2	10989.5	13326.5	71330	84078.0
9	F	1681.0	3374.2	6050.4	8407.7	11022.7	15164.1	17868	92038.1	106434.3
10	Ne	2080.7	3952.3	6122	9371	12177	15238	19999.0	23069.5	115379.5	131432
11	Na	495.8	4562	6910.3	9543	13354	16613	20117	25496	28932	141362
12	Mg	737.7	1450.7	7732.7	10542.5	13630	18020	21711	25661	31653	35458
13	Al	577.5	1816.7	2744.8	11577	14842	18379	23326	27465	31853	38473
14	Si	786.5	1577.1	3231.6	4355.5	16091	19805	23780	29287	33878	38726
15	P	1011.8	1907	2914.1	4963.6	6273.9	21267	25431	29872	35905	40950
16	S	999.6	2252	3357	4556	7004.3	8495.8	27107	31719	36621	43177
17	Cl	1251.2	2298	3822	5158.6	6542	9362	11018	33604	38600	43961
18	Ar	1520.6	2665.8	3931	5771	7238	8781	11995	13842	40760	46186
19	K	418.8	3052	4420	5877	7975	9590	11343	14944	16963.7	48610
20	Ca	589.8	1145.4	4912.4	6491	8153	10496	12270	14206	18191	20385
21	Sc	633.1	1235.0	2388.6	7090.6	8843	10679	13310	15250	17370	21726
22	Ti	658.8	1309.8	2652.5	4174.6	9581	11533	13590	16440	18530	20833
23	V	650.9	1414	2830	4507	6298.7	12363	14530	16730	19860	22240
24	Cr	652.9	1590.6	2987	4743	6702	8744.9	15455	17820	20190	23580
25	Mn	717.3	1509.0	3248	4940	6990	9220	11500	18770	21400	23960
26	Fe	762.5	1561.9	2957	5290	7240	9560	12060	14580	22540	25290
27	Co	760.4	1648	3232	4950	7670	9840	12440	15230	17959	26570
28	Ni	737.1	1753.0	3395	5300	7339	10400	12800	15600	18600	21670
29	Cu	745.5	1957.9	3555	5536	7700	9900	13400	16000	19200	22400
30	Zn	906.4	1733.3	3833	5731	7970	10400	12900	16800	19600	23000
31	Ga	578.8	1979.3	2963	6180
32	Ge	762	1537.5	3302.1	4411	9020
33	As	947.0	1798	2735	4837	6043	12310
34	Se	941.0	2045	2973.7	4144	6590	7880	14990
35	Br	1139.9	2103	3470	4560	5760	8550	9940	18600
36	Kr	1350.8	2350.4	3565	5070	6240	7570	10710	12138	22274	25880
37	Rb	403.0	2633	3860	5080	6850	8140	9570	13120	14500	26740
38	Sr	549.5	1064.2	4138	5500	6910	8760	10230	11800	15600	17100
39	Y	600	1180	1980	5847	7430	8970	11190	12450	14110	18400
40	Zr	640.1	1270	2218	3313	7752	9500
41	Nb	652.1	1380	2416	3700	4877	9847	12100
42	Mo	684.3	1560	2618	4480	5257	6640.8	12125	13860	15835	17980
43	Tc	702	1470	2850
44	Ru	710.2	1620	2747
45	Rh	719.7	1740	2997
46	Pd	804.4	1870	3177
47	Ag	731.0	2070	3361
48	Cd	867.8	1631.4	3616
49	In	558.3	1820.7	2704	5210
50	Sn	708.6	1411.8	2943.0	3930.3	7456
51	Sb	834	1594.9	2440	4260	5400	10400
52	Te	869.3	1790	2698	3610	5668	6820	13200
53	I	1008.4	1845.9	3180
54	Xe	1170.4	2046.4	3099.4
55	Cs	375.7	2234.3	3400
56	Ba	502.9	965.2	3600
57	La	538.1	1067	1850.3	4819	5940
58	Ce	534.4	1050	1949	3547	6325	7490
59	Pr	527	1020	2086	3761	5551
60	Nd	533.1	1040	2130	3900
61	Pm	540	1050	2150	3970
62	Sm	544.5	1070	2260	3990
63	Eu	547.1	1085	2404	4120
64	Gd	593.4	1170	1990	4250
65	Tb	565.8	1110	2114	3839
66	Dy	573.0	1130	2200	3990
67	Ho	581.0	1140	2204	4100
68	Er	589.3	1150	2194	4120
69	Tm	596.7	1160	2285	4120
70	Yb	603.4	1174.8	2417	4203
71	Lu	523.5	1340	2022.3	4370	6445
72	Hf	658.5	1440	2250	3216
73	Ta	761	1500
74	W	770	1700
75	Re	760	1260	2510	3640
76	Os	840	1600
77	Ir	880	1600
78	Pt	870	1791
79	Au	890.1	1980
80	Hg	1007.1	1810	3300
81	Tl	589.4	1971	2878
82	Pb	715.6	1450.5	3081.5	4083	6640
83	Bi	703	1610	2466	4370	5400	8520
84	Po	812.1
85	At	899.003
86	Rn	1037
87	Fr	380
88	Ra	509.3	979.0
89	Ac	499	1170	1900	4700
90	Th	587	1110	1978	2780
91	Pa	568	1128		2991
92	U	597.6	1420	1900	3145
93	Np	604.5	1128	1997	3242
94	Pu	584.7	1128	2084	3338
95	Am	578	1158	2132	3493
96	Cm	581	1196	2026	3550
97	Bk	601	1186	2152	3434
98	Cf	608	1206	2267	3599
99	Es	619	1216	2334	3734
100	Fm	627	1225	2363	3792
101	Md	635	1235	2470	3840
102	No	642	1254	2643	3956
103	Lr	470	1428	2228	4910
104	Rf	579.9	1389.4	2296.4	3077.9
105	Db	664.8	1546.7	2378.4	3298.8	4305.2
106	Sg	757.4	1732.9	2483.5	3415.6	4561.8	5715.8
107	Bh	742.9	1688.5	2566.5	3598.9	4727.8	5991.7	7226.8
108	Hs	733.3	1756.0	2827.0	3637.5	4940.0	6175.1	7535.5	8857.4
109	Mt	800.8	1823.6	2904.2	3859.4	4920.8
110	Ds	955.2	1891.1	3029.6	3955.9	5113.7
111	Rg	1022.7	2074.4	3077.9	4052.4	5306.7
112	Cn	1154.9	2170.0	3164.7	4245.4	5499.7
113	Uut	704.9	2238.5	3023.3	4351.5	5692.6
114	Fl	823.9	1601.6	3367.3	4399.7	5847.0
115	Uup	538.4	1756.0	2653.3	4679.5	5721.6
116	Lv	723.6	1331.5	2846.3	3811.2	6078.6
117	Uus	742.9	1785.0–1920.1
118	Uuo	839.4	1563.1
119	Uue	463.1	1698.1
120	Ubn	578.9	895.4–918.5
121	Ubu	429.4

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