Table 1-1. Electron binding energies, in electron volts, for the elements in their natural forms.
Table 1-1. Electron binding energies (continued).
Element	Kls	L| 2s	L2 2Pl/2	Lg 2p3/2	Mi 3s	M23pi/2	M3 3P3/2	M4 3d,/2	Ms 3ll5/2	Ni 4s	N2 4p1/2	N.I -lp.1/2
1 11	13.6											
2 He	24.6»											
3 Li	54.7«											
4 Be	111.5»											
5 1!	188»											
6 C	284.2*											
7 N	409.9*	37.3*										
8 0	543.1»	41.6«										
9 I	696.7»											
10 Ne	870.2»	48.5«	21.7*	21.6«								
11 Na	1070.84	63.5t	30.65	10.81								
12 Mg	1303.04	88.7	49.78	49.50								
13 Al	1559.6	L17.8	72.95	72.55								
14 Si	1839	I49.7*b	99.82	99.42								
li I'	2145.5	189*	136*	135*								
16 s	2472	230.9	163.6«	162.5*								
17 CI	2822.4	270*	202*	2O0*								
IS Ar	3205.9*	326.3*	250.6f	248.4*	29.3*	15.9*	15.7*					
19 K	3608.4*	378.6*	297.3*	294.6*	34.8*	18.3*	18.3*					
20 Ca	4038.5*	438.4T	349.7t	346.2t	44.3 t	25.4t	25.41					
21 Sc	4492	498.0*	403.6*	398.7*	51.1*	28.3*	28.3*					
22 Ti	4966	560.9f	460.24	453.8t	58.7t	32.61	32.6f					
23 V	5465	626.7f	519.8f	512.lt	60.lt	37.21	37.21					
24 Cr	5989	696.01	583.8f	574.lt	74.lt	42.2t	42.21					
25 Mn	6539	769. If	649.94	638.7f	82.3t	47.2t	47.21					
26 Fe	7112	844.6f	719.94	706.8t	91.3t	52.71	52.7t					
27 Co	7709	925.lt	793.2t	778.lt	101.0t	58.91	59.91					
28 Ni	8333	I008.6t	870.04	852.7t	110.8t	68.01	66.2t					
29 Cu	8979	1096.7f	952.3f	932.7	122.5t	77.31	75.11					
30 Zn	965')	1196.2*	1044.9*	1021.8*	139.8*	'111	88.6*	10.2«	10.1 :			
31 Ga	10367	1299.0*b	1143.2f	I116.4f	159.5t	103.51-	100.0t	18.71	18.71			
32 Ge	11103	1414.6*b	1248.1*b	I217.0*b	180.1*	124.9*	120.8*	29.8	29.2			
33 As	11867	1527.0*b	1359.1*b	1323.6*b	204.7*	146.2*	141.2*	41.7*	41.7*			
34 Se	12658	I652.0*b	1474.3*b	1433.9*b	229.6*	166.5*	160.7*	55.5*	54.6*			
35 Br	13474	1782»	1596*	15501	257*	189*	182*	70*	69*			
36 Kr	14326	1921	1730.9*	1678.4*	292.8*	222.2*	214.4	95.0*	93.8*	27.5*	14.1	14.1*
37 Rb	15200	2065	1864	1804	326.7*	248.7*	239.1*	113.0*	112*	30.5*	16.3*	15.3 *
38 Sr	16105	2216	2007	1940	358.7t	280.3f	270.01	136.01	134.21	38.91	21.3	20.11
39 Y	17038	2373	2156	2080	392.0*b	310.6*	298.8*	157.71	155.8t	43.8*	24.4*	23.1*
41) /,	17998	2532	2307	2223	430.3t	343.5*	329.8t	181.11	178.8t	50.61	28.5t	27.11
41 Nb	18986	2698	2465	2371	466.6t	376.lt	360.61	205.01	202.31	56.41	32.61	30.81
42 Mo	20000	2866	2625	2520	506.3t	411.6t	394.0t	231.11	227.91	63.21	37.61	35.51
43 Tc	21044	3043	2793	2677	544*	447.6	417.7	257.6	253.9*	69.5*	42.3*	39.9*
44 Ru	22117	3224	2967	:sis	586.1*	483.5t	461.4t	2X4.21	280.01	75.01	46.3t	43.21
45 Uli	23220	3412	3146	1004	628.lt	521.3t	496.5t	311.91	307.21	8l.4*b	50.5t	47.31
46 Pd	24350	3604	3330	3173	671.6t	559.91	532.31	340.51	335.21	87.1*b	55.7ta	50.91
47 Ag	25514	3806	3524	3351	719.0t	603.8i	573.0t	374.01	368.3	97.01	63.71	58.31
Element	K Is	I., 2s	L2 2Pl/2	L3 2p.l/2	M] 3s	M2 3pi,2	M, 3p3,2	M4 3d1/2	Ms 3d5/2	N] 4s	N2 4p1/2	N.l 4P.V2
48 Cd	26711	4018	3727	3538	772.04	652.6t	618.44	411.9t	405.2t	109.8t	63.94a	63.9ta
49 In	27940	4238	3938	3730	827.21	703.2t	665.31	451.4t	443.9t	122.91	73.5ta	73.5ta
50 Sn	29200	4 165	4156	3929	884.71	756.5t	714.61	493.2t	484.91	137.11	83.61a	83.6ta
51 Sb	50491	4698	4380	4137	9461	812.7t	766.41	537.51	528.2t	153.21	95.6ta	95.6ta
52 Te	31814	4939	4612	4341	10061	870.8t	820.0t	583.41	573.0t	169.4t	103.31a	103.3ta
53 I	33169	5188	4852	455-	1072*	931*	875*	630.8	619.3	IS6	123*	123*
54 Xe	34561	5453	5107	4786	1148.7*	1002.1*	940.6*	689.0»	676.4*	213.2«	146.7	145.5
55 Cs	35985	5714	5359	5017	1211*b	1071*	1003*	740.5*	726.6*	232.3«	172.4*	161.3*
56 Ba	37441	5989	5624	5247	1293*b	1137*b	1063*b	795.71	780.5*	253.51	192	178.61
57 La	38925	6266	5891	5483	1362*b	1209*b	1128*b	853»	836*	274.7*	205.8	196.0*
58 Ce	40443	6549	6164	5723	1436*b	1274*b	U87*b	902.4*	883.8*	291.0*	223.2	206.5*
59 Pr	41991	6835	1.14(1	5964	15 1 1	1337	1242	948.3»	928.8*	304.5	236.3	217.6
60 Nd	43569	7126	6722	671 IS	1575	1403	1297	1003.3*	980.4*	319.2*	243.3	224.6
61 Pm	45184	7428	7013	6459	—	1471	1357	I0S2	1027	—	242	242
62 Sm	46834	7757	7312	6716	1723	1541	1420	1110.9*	1083.4*	347.2*	265.6	247 4
63 Eu	48519	81152	7617	6977	1800	1614	I4S1	1158.6*	1127.5*	360	284	257
64 Gd	50239	8376	7930	7247	1881	1688	15 14	1221.9*	1189.6*	378.6*	2S6	771
65 Tb	51996	8708	8252	7514	1968	1768	1611	1276.9*	1241.1*	396.0*	322.4*	284.1*
66 Dy	53789	9046	8581	7790	2047	1842	1676	1333	1292.6*	414.2*	333.5*	293.2*
67 Ho	55618	9394	8918	8071	212S	1923	1741	1 597	1351	432.4*	343.5	308.2*
68 Er	57486	9751	9264	8358	2207	2006	1812	1453	1409	449.8«	366.2	320.2*
69 Tm	59390	101 16	9617	S64S	2307	2090	1885	1515	1468	470.9*	385.9*	332.6*
70 Yb	61332	10486	9978	»944	2398	2173	1 '150	1579	152«	480.5*	388.7»	339.7*
Element	K Is	l.| In	L2 2Pl/2	L.1 2p.V2	Mi 3s	M2 3p|/2	M3 3p3,2	M4 3d ,/2	M5 3d5/2	N| 4s	N2 4pr/2	N3 4P3/2
71 Lu	63314	10870	10349	9244	2491	2264	2024	1639	1589	506.8*	412.4*	359.2*
72 Hf	65351	11271	10739	9561	2601	2365	7105	1716	1662	538*	438.2t	380.7t
73 Ta	67416	11682	11136	9881	2708	2469	2194	1793	1735	563.41	463.4f	400.9t
74 W	69525	12100	11544	10207	2820	2575	2781	1877	1809	594.lt	490.41	423.61
75 Re	71676	12527	11959	10535	2932	2682	2367	1949	1883	625.4t	518.71	446.81
76 Os	73871	12968	12385	10871	31149	2792	2457	2031	1960	658.2t	549.1t	470.71
77 Ir	76111	13419	12824	11215	3174	2909	2551	2116	2040	69l.lt	577.8t	495,81
78 Pi	78395	13880	13273	11564	32%	5(177	2645	2202	2122	725.4t	609.1t	519.41
79 Au	80725	14353	13734	11919	3425	3148	2743	7291	2206	762.lt	642.7t	546.3t
80 Hg	83102	14839	14209	12284	3562	3279	2847	2385	2295	802.2t	680.24	576.61
81 Tl	85530	15347	14698	12658	3704	3416	2957	2485	2389	846.21	720.51	609.51
82 Pb	88005	15861	15200	13035	.5X51	3554	7-066	2586	2484	891.8t	761.91	643.51
83 Bi	90524	16388	15711	13419	7999	3696	5177	2688	25S0	939t	805.2t	678.81
84 Po	93105	16939	16244	13814	1149	3854	3302	2798	2683	995»	851"	705*
85 At	95730	17493	16785	14214	(3 1 7	40O8	3426	2909	2787	1042»	886*	740
86 Rn	98404	18049	17337	14619	4487	4159	3538	3022	2892	1097»	929*	768*
87 Fr	101137	18639	17907	15031	4652	4327	3663	3136	3000	1153*	980*	810
88 Ra	103922	19237	18484	15444	4822	4490	3792	3248	5105	1208*	1058	879*
89 Ac	106755	19840	19083	15871	5002	4056	7.909	5570	.5219	1269*	1080*	89(1
90 Th	109651	20472	19693	1630(1	5182	4830	4046	549 1	3332	1330*	1168*	966.41
91 Pa	112601	21105	20314	16733	5367	5001	4174	561 1	3442	1387*	1224*	1007*
92 U	115606	21757	20948	17166	5548	51X2	4303	3728	3552	1439'b	1271*b	1043t