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A320506
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First ionization energy (in kJ/mol) of the chemical elements, rounded to the nearest integer.
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2
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1312, 2372, 520, 900, 801, 1087, 1402, 1314, 1681, 2081, 496, 738, 578, 787, 1012, 1000, 1251, 1521, 419, 590, 633, 659, 651, 653, 717, 763, 760, 737, 746, 906, 579, 762, 947, 941, 1140, 1351, 403, 550, 600, 640, 652, 684, 702, 710, 720, 804, 731, 868, 558, 709, 834, 869, 1008, 1170, 376, 503, 538, 534, 527, 533, 540, 545, 547, 593, 566, 573, 581, 589, 597, 603, 524, 659, 761, 770, 760, 840, 880, 870, 890, 1007, 589, 716, 703, 812, 899, 1037, 380, 509, 499, 587, 568, 598, 605, 585, 578, 581, 601, 608, 619, 627, 635, 642, 470, 580
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OFFSET
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1,1
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COMMENTS
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The first ionization energy of an element X is the enthalpy change of X (g) -> X+ (g) + e-.
The values for chemical elements in each period (1 - 2, 3 - 10, 11 - 18, 19 - 36, 37 - 54, 55 - 86) are overall increasing, with boron group elements (boron, aluminum, gallium, indium, thallium) having relative low first ionization energies comparing with their nearby elements.
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LINKS
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EXAMPLE
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The first ionization energies for hydrogen (1), helium (2) and lithium (3), etc. are 1312.0 kJ/mol, 2372.3 kJ/mol, 520.2 kJ/mol, etc.
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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