Table 1-2

Table 1-1. Electron binding energies, in electron volts, for the elements in their natural forms.

Element	K 1s	L₁2s	L₂2p_1/2	L₃2p_3/2	M₁3s	M₂3p_1/2	M₃3p_3/2	M₄3d_3/2	M₅3d_5/2	N₁4s	N₂4p_1/2	N₃4p_3/2
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	2108	1716	1662	538*	438.2†	380.7†
73 Ta	67416	11682	11136	9881	2708	2469	2194	1793	1735	563.4†	463.4†	400.9†
74 W	69525	12100	11544	10207	2820	2575	2281	1872	1809	594.1†	490.4†	423.6†
75 Re	71676	12527	11959	10535	2932	2682	2367	1949	1883	625.4†	518.7†	446.8†
76 Os	73871	12968	12385	10871	3049	2792	2457	2031	1960	658.2†	549.1†	470.7†
77 Ir	76111	13419	12824	11215	3174	2909	2551	2116	2040	691.1†	577.8†	495.8†
78 Pt	78395	13880	13273	11564	3296	3027	2645	2202	2122	725.4†	609.1†	519.4†
79 Au	80725	14353	13734	11919	3425	3148	2743	2291	2206	762.1†	642.7†	546.3†
80 Hg	83102	14839	14209	12284	3562	3279	2847	2385	2295	802.2†	680.2†	576.6†
81 Tl	85530	15347	14698	12658	3704	3416	2957	2485	2389	846.2†	720.5†	609.5†
82 Pb	88005	15861	15200	13035	3851	3554	3066	2586	2484	891.8†	761.9†	643.5†
83 Bi	90524	16388	15711	13419	3999	3696	3177	2688	2580	939†	805.2†	678.8†
84 Po	93105	16939	16244	13814	4149	3854	3302	2798	2683	995*	851*	705*
85 At	95730	17493	16785	14214	4317	4008	3426	2909	2787	1042*	886*	740*
86 Rn	98404	18049	17337	14619	4482	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	3105	1208*	1058	879*
89 Ac	106755	19840	19083	15871	5002	4656	3909	3370	3219	1269*	1080*	890*
90 Th	109651	20472	19693	16300	5182	4830	4046	3491	3332	1330*	1168*	966.4†
91 Pa	112601	21105	20314	16733	5367	5001	4174	3611	3442	1387*	1224*	1007*
92 U	115606	21757	20948	17166	5548	5182	4303	3728	3552	1439*b	1271*b	1043†

Table 1-1. Electron binding energies (continued).

Element

N₄4d_3/2

N₅4d_5/2

N₆4f_5/2

N₇4f_7/2

O₁5s

O₂5p_1/2

O₃5p_3/2

O₄5d_3/2

O₅5d_5/2

P₁6s

P₂6p_1/2

P₃6p_3/2

71 Lu

206.1*

196.3*

8.9*

7.5*

57.3*

33.6*

26.7*

72 Hf

220.0†

211.5†

15.9†

14.2†

64.2†

38*

29.9†

73 Ta

237.9†

226.4†

23.5†

21.6†

69.7†

42.2*

32.7†

74 W

255.9†

243.5†

33.6*

31.4†

75.6†

45.3*b

36.8†

75 Re

273.9†

260.5†

42.9*

40.5*

83†

45.6*

34.6*b

76 Os

293.1†

278.5†

53.4†

50.7†

84*

58*

44.5†