Table 1-2

Table 1-1. Electron binding energies, in electron volts, for the elements Cd (48) to Yb (70) 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
48 Cd	26711	4018	3727	3538	772.0†	652.6†	618.4†	411.9†	405.2†	109.8†	63.9†a	63.9†a
49 In	27940	4238	3938	3730	827.2†	703.2†	665.3†	451.4†	443.9†	122.9†	73.5†a	73.5†a
50 Sn	29200	4465	4156	3929	884.7†	756.5†	714.6†	493.2†	484.9†	137.1†	83.6†a	83.6†a
51 Sb	30491	4698	4380	4132	946†	812.7†	766.4†	537.5†	528.2†	153.2†	95.6†a	95.6†a
52 Te	31814	4939	4612	4341	1006†	870.8†	820.0†	583.4†	573.0†	169.4†	103.3†a	103.3†a
53 I	33169	5188	4852	4557	1072*	931*	875*	630.8	619.3	186*	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	5012	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	795.7†	780.5*	253.5†	192	178.6†
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	1187*b	902.4*	883.8*	291.0*	223.2	206.5*
59 Pr	41991	6835	6440	5964	1511	1337	1242	948.3*	928.8*	304.5	236.3	217.6
60 Nd	43569	7126	6722	6208	1575	1403	1297	1003.3*	980.4*	319.2*	243.3	224.6
61 Pm	45184	7428	7013	6459	—	1471	1357	1052	1027	—	242	242
62 Sm	46834	7737	7312	6716	1723	1541	1420	1110.9*	1083.4*	347.2*	265.6	247.4
63 Eu	48519	8052	7617	6977	1800	1614	1481	1158.6*	1127.5*	360	284	257
64 Gd	50239	8376	7930	7243	1881	1688	1544	1221.9*	1189.6*	378.6*	286	271
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	2128	1923	1741	1392	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	10116	9617	8648	2307	2090	1885	1515	1468	470.9*	385.9*	332.6*
70 Yb	61332	10486	9978	8944	2398	2173	1950	1576	1528	480.5*	388.7*	339.7*

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
48 Cd	11.7†	l0.7†
49 In	17.7†	16.9†
50 Sn	24.9†	23.9†
51 Sb	33.3†	32.1†
52 Te	41.9†	40.4†
53 I	50.6	48.9
54 Xe	69.5*	67.5*	—	—	23.3*	13.4*	12.1*
55 Cs	79.8*	77.5*	—	—	22.7	14.2*	12.1*
56 Ba	92.6†	89.9†	—	—	30.3†	17.0†	14.8†
57 La	105.3*	102.5*	—	—	34.3*	19.3*	16.8*
58 Ce	109*	—	0.1	0.1	37.8	19.8*	17.0*
59 Pr	115.1*	115.1*	2.0	2.0	37.4	22.3	22.3
60 Nd	120.5*	120.5*	1.5	1.5	37.5	21.1	21.1
61 Pm	120	120	—	—	—	—	—
62 Sm	129	129	5.2	5.2	37.4	21.3	21.3
63 Eu	133	127.7*	0	0	32	22	22
64 Gd	—	142.6*	8.6*	8.6*	36	28	21
65 Tb	150.5*	150.5*	7.7*	2.4*	45.6*	28.7*	22.6*
66 Dy	153.6*	153.6*	8.0*	4.3*	49.9*	26.3	26.3
67 Ho	160*	160*	8.6*	5.2*	49.3*	30.8*	24.1*
68 Er	167.6*	167.6*	—	4.7*	50.6*	31.4*	24.7*
69 Tm	175.5*	175.5*	—	4.6	54.7*	31.8*	25.0*
70 Yb	191.2*	182.4*	2.5*	1.3*	52.0*	30.3*	24.1*