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preface to fifteenth edition

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PROPERTIES OF ATOMS,RADICALS,AND BONDS 4.7<br />

TABLE 4.2<br />

Ionization Energy of the Elements (Continued)<br />

At.<br />

no.<br />

Element<br />

Spectrum (in MJ · mol 1 )<br />

I II III IV V VI<br />

41 Nb 0.664 1.382 2.416 3.695 4.877 9.847<br />

42 Mo 0.685 1.558 2.621 4.477 5.91 6.641<br />

43 Tc 0.702 1.472 2.850<br />

44 Ru 0.711 1.617 2.747<br />

45 Rh 0.720 1.744 2.997<br />

46 Pd 0.805 1.875 3.177<br />

47 Ag 0.731 2.073 3.361<br />

48 Cd 0.868 1.631 3.616<br />

49 In 0.558 1.821 2.704 5.2<br />

50 Sn 0.709 1.412 2.943 3.930 6.974<br />

51 Sb 0.834 1.595 2.44 4.26 5.4 10.4<br />

52 Te 0.869 1.795 2.698 3.610 5.668 6.82<br />

53 I 1.008 1.846 3.2<br />

54 Xe 1.170 2.046 3.099<br />

55 Cs 0.376 2.234<br />

56 Ba 0.503 0.965<br />

57 La 0.538 1.067 1.850 4.820 5.94<br />

58 Ce 0.528 1.047 1.949 3.547 6.325 7.487<br />

59 Pr 0.523 1.018 2.086 3.761 5.551<br />

60 Nd 0.530 1.035 2.13 3.90<br />

61 Pm 0.535 1.052 2.15 3.97<br />

62 Sm 0.543 1.068 2.26 3.99<br />

63 Eu 0.547 1.085 2.40 4.12<br />

64 Gd 0.592 1.167 1.99 4.26<br />

65 Tb 0.564 1.112 2.114 3.839<br />

66 Dy 0.572 1.126 2.20 3.99<br />

67 Ho 0.581 1.139 2.204 4.10<br />

68 Er 0.589 1.151 2.194 4.13<br />

69 Tm 0.596 1.163 2.285 4.13<br />

70 Yb 0.603 1.174 2.417 4.203<br />

71 Lu 0.524 1.34 2.022 4.366<br />

72 Hf 0.68 1.44 2.25 3.216<br />

73 Ta 0.761<br />

74 W 0.770<br />

75 Re 0.760<br />

76 Os 0.84<br />

77 Ir 0.88<br />

78 Pt 0.87 1.791<br />

79 Au 0.890 1.98<br />

80 Hg 1.007 1.810 3.30<br />

81 Tl 0.589 1.971 2.878<br />

82 Pb 0.716 1.450 3.081 4.083 6.64<br />

83 Bi 0.703 1.610 2.466 4.371 5.40 8.52<br />

84 Po 0.812<br />

85 At<br />

86 Rn 1.037<br />

87 Fr<br />

88 Ra 0.509 0.979<br />

89 Ac 0.67 1.17<br />

90 Th 0.587 1.11 1.93 2.78<br />

91 Pa 0.568

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