Ionization energies of the elements (data page)

Molar ionization energies and corresponding ionization energies

["use" and "WEL" give former in the unit "kJ/mol"; "CRC" gives latter in the unit "eV".]

123456789101112131415161718192021222324252627282930
1 H hydrogen
use1312.0
WEL1312.0
CRC13.59844
2 He helium
use2372.35250.5
WEL2372.35250.5
CRC24.5874154.41778
3 Li lithium
use520.27298.111815.0
WEL520.27298.111815.0
CRC5.3917275.64018122.45429
4 Be beryllium
use899.51757.114848.721006.6
WEL899.51757.114848.721006.6
CRC9.322718.21116153.89661217.71865
5 B boron
use800.62427.13659.725025.832826.7
WEL800.62427.13659.725025.832826.7
CRC8.2980325.1548437.93064259.37521340.22580
6 C carbon
use1086.52352.64620.56222.73783147277.0
WEL1086.52352.64620.56222.73783147277.0
CRC11.2603024.3833247.887864.4939392.087489.99334
7 N nitrogen
use1402.328564578.17475.09444.953266.664360
WEL1402.328564578.17475.09444.953266.664360
CRC14.5341429.601347.4492477.473597.8902552.0718667.046
8 O oxygen
use1313.93388.35300.57469.210989.513326.57133084078.0
WEL1313.93388.35300.57469.210989.513326.57133084078.0
CRC13.6180635.1173054.935577.41353113.8990138.1197739.29871.4101
9 F fluorine
use1681.03374.26050.48407.711022.715164.11786892038.1106434.3
WEL1681.03374.26050.48407.711022.715164.11786892038.1106434.3
CRC17.4228234.9708262.708487.1398114.2428157.1651185.186953.91121103.1176
10 Ne neon
use2080.73952.361229371121771523819999.023069.5115379.5131432
WEL2080.73952.361229371121771523819999.023069.5115379.5131432
CRC21.564640.9632863.4597.12126.21157.93207.2759239.09891195.82861362.1995
11 Na sodium
use495.845626910.395431335416613201172549628932141362159076
WEL495.845626910.395431335416613201172549628932141362
CRC5.1390847.286471.620098.91138.40172.18208.50264.25299.8641465.1211648.702
12 Mg magnesium
use737.71450.77732.710542.5136301802021711256613165335458169988189368
WEL737.71450.77732.710542.5136301802021711256613165335458
CRC7.6462415.0352880.1437109.2655141.27186.76225.02265.96328.06367.501761.8051962.6650
13 Al aluminium
use577.51816.72744.81157714842183792332627465318533847342647201266222316
WEL577.51816.72744.811577148421837923326274653185338473
CRC5.9857718.8285628.44765119.992153.825190.49241.76284.66330.13398.75442.002085.982304.1410
14 Si silicon
use786.51577.13231.64355.51609119805237802928733878387264596250502235196257923
WEL786.51577.13231.64355.5160911980523780292873387838726
CRC8.1516916.3458533.4930245.14181166.767205.27246.5303.54351.12401.37476.36523.422437.632673.182
15 P phosphorus
use1011.819072914.14963.66273.92126725431298723590540950462615411059024271791296195
WEL1011.819072914.14963.66273.92126725431298723590540950
CRC10.4866919.769430.202751.443965.0251220.421263.57309.60372.13424.4479.46560.8611.742816.913069.842
16 S sulfur
use999.62252335745567004.38495.82710731719366214317748710544606293068216311048337138
WEL999.62252335745567004.38495.827107317193662143177
CRC10.3600123.337934.7947.22272.594588.0530280.948328.75379.55447.5504.8564.44652.2707.013223.783494.1892
17 Cl chlorine
use1251.2229838225158.665429362110183360438600439615106857119633637234178095352994380760
WEL1251.2229838225158.66542936211018336043860043961
CRC12.9676423.81439.6153.465267.897.03114.1958348.28400.06455.63529.28591.99656.71749.76809.403658.5213946.2960
18 Ar argon
use1520.62665.8393157717238878111995138424076046186520025965366199729188247388576397605427066
WEL1520.62665.8393157717238878111995138424076046186
CRC15.7596227.6296740.7459.8175.0291.009124.323143.460422.45478.69538.96618.26686.10755.74854.77918.034120.88574426.2296
19 K potassium
use418.830524420587779759590113431494416963.74861054490607306895075900830809340099710444880476063
WEL418.830524420587779759590113431494416963.748610
CRC4.3406631.6345.80660.9182.6699.4117.56154.88175.8174503.8564.7629.4714.6786.6861.19681033.44610.84934.046
20 Ca calcium
use589.81145.44912.4649181531049612270142061819120385571106341070110788908631094000104900111711494850527762
WEL589.81145.44912.464918153104961227014206181912038557110
CRC6.1131611.8717250.913167.2784.50108.78127.2147.24188.54211.275591.9657.2726.6817.6894.597410871157.85128.85469.864
21 Sc scandium
use633.11235.02388.67090.688431067913310152501737021726241026632073010801608949097400105600117000124270547530582163
WEL633.11235.02388.67090.688431067913310152501737021726241026632073010801608949097400105600117000124270547530582163
CRC6.561512.7996724.7566673.489491.65110.68138.0158.1180.03225.18249.798687.36756.7830.8927.51009109412131287.975674.86033.712
22 Ti titanium
use658.81309.82652.54174.6958111533135901644018530208332557528125760158328090880100700109100117800129900137530602930639294
WEL658.81309.82652.54174.6958111533135901644018530208332557528125760158328090880100700109100117800129900137530602930
CRC6.828113.575527.491743.267299.30119.53140.8170.4192.1215.92265.07291.500787.84863.1941.910441131122113461425.46249.06625.82
23 V vanadium
use650.91414283045076298.712363145301673019860222402467029730324468645094170102300112700121600130700143400151440661050699144
WEL650.91414283045076298.712363145301673019860222402467029730324468645094170102300112700121600130700143400151440
CRC6.746214.6629.31146.70965.2817128.13150.6173.4205.8230.5255.7308.1336.277896.0976106011681260135514861569.66851.37246.12
24 Cr chromium
use652.91590.62987474367028744.9154551782020190235802613028750342303706697510105800114300125300134700144300157700166090721870761733
WEL652.91590.62987474367028744.9154551782020190235802613028750342303706697510105800114300125300134700144300157700
CRC6.766516.485730.9649.1669.4690.6349160.18184.7209.3244.4270.8298.0354.8384.1681010.61097118512991396149616341721.47481.77894.81
25 Mn manganese
use717.31509.03248494069909220115001877021400239602759030330331503888041987109480118100127100138600148500158600172500181380785450827067
WEL717.31509.03248494069909220115001877021400239602759030330331503888041987109480118100127100138600148500158600
CRC7.4340215.6399933.66851.272.495.6119.203194.5221.8248.3286.0314.4343.6403.0435.1631134.71224131714371539164417881879.98140.68571.94
26 Fe iron
use762.51561.9295752907240956012060145802254025290280003192034830378404410047206122200131000140500152600163000173600188100195200851800895161
WEL762.51561.9295752907240956012060145802254025290280003192034830378404410047206122200131000140500152600163000
CRC7.902416.187830.65254.875.099.1124.98151.06233.6262.1290.2330.8361.0392.2457489.2561266135814561582168917991950202388289277.69
27 Co cobalt
use760.4164832324950767098401244015230179592657029400324003660039700428004939652737134810145170154700167400178100189300204500214100920870966023
WEL760.4164832324950767098401244015230179592657029400324003660039700428004939652737134810145170154700167400
CRC7.881017.08333.5051.379.5102.0128.9157.8186.13275.4305336379411444511.96546.581397.21504.6160317351846196221192219.09544.110012.12
28 Ni nickel
use737.11753.0339553007339104001280015600186002167030970340003710041500448004810055101585701487001590001694001827001940002056002214002314909927181039668
WEL737.11753.033955300733910400128001560018600216703097034000371004150044800481005510158570148700159000169400
CRC7.639818.1688435.1954.976.06108133162193224.6321.0352384430464499571.08607.0615411648175618942011213122952399.210288.810775.40
29 Cu copper
use745.51957.935555536770099001340016000192002240025600356003870042000467005020053700611006470216370017410018490019880021050022270023910024966010673581116105
WEL745.51957.9355555367700990013400160001920022400256003560038700420004670050200537006110064702163700174100
CRC7.7263820.2924036.84157.3879.8103139166199232265.3369401435484520557633670.58816971804191620602182230824782587.511062.3811567.617
30 Zn zinc
use906.41733.3383357317970104001290016800196002300026400299904049043800473005230055900597006730071200179100
WEL906.41733.3383357317970104001290016800196002300026400299904049043800473005230055900597006730071200179100
CRC9.394217.9644039.72359.482.6108134174203238274310.8419.74544905425796196987381856
31 Ga gallium
use578.81979.329636180
WEL578.81979.329636180
CRC5.9993020.514230.7164
32 Ge germanium
use7621537.53302.144119020
WEL7621537.53302.144119020
CRC7.899415.9346234.224145.713193.5
33 As arsenic
use947.0179827354837604312310
WEL947.0179827354837604312310
CRC9.788618.63328.35150.1362.63127.6
34 Se selenium
use941.020452973.741446590788014990
WEL941.020452973.741446590788014990
CRC9.7523821.1930.820442.945068.381.7155.4
35 Br bromine
use1139.921033470456057608550994018600
WEL1139.921033470456057608550994018600
CRC11.8138121.83647.359.788.6103.0192.8
36 Kr krypton
use1350.82350.435655070624075701071012138222742588029700338003770043100475005220057100618007580080400853009040096300101400111100116290282500296200311400326200
WEL1350.82350.43565507062407570107101213822274258802970033800377004310047500522005710061800758008040085300
CRC13.9996124.3598536.95052.564.778.5111.0125.802230.85268.2308350391447492541592641786833884937998105111511205.32928307032273381
37 Rb rubidium
use403.0263338605080685081409570131201450026740
WEL403.0263338605080685081409570131201450026740
CRC4.1771327.2854052.671.084.499.2136150277.1
38 Sr strontium
use549.51064.241385500691087601023011800156001710031270
WEL549.51064.2413855006910876010230118001560017100
CRC5.694911.0301342.895771.690.8106122.3162177324.1
39 Y yttrium
use60011801980584774308970111901245014110184001990036090
WEL6001180198058477430897011190124501411018400
CRC6.217112.2420.5260.59777.093.0116129146.2191206374.0
40 Zr zirconium
use640.112702218331377529500
WEL640.112702218331377529500
CRC6.6339013.1322.9934.3480.348
41 Nb niobium
use652.11380241637004877984712100
WEL652.11380241637004877984712100
CRC6.7588514.3225.0438.350.55102.057125
42 Mo molybdenum
use684.315602618448052576640.81212513860158351798020190222192693029196524905500061400677007400080400870009340098420104400121900127700133800139800148100154500
WEL684.315602618448052576640.8121251386015835179802019022219269302919652490550006140067700740008040087000
CRC7.0924316.1627.1346.454.4968.8276125.664143.6164.12186.4209.3230.28279.1302.60544.057063670276783390296810201082126313231387144915351601
43 Tc technetium
use70214702850
WEL70214702850
CRC7.2815.2629.54
44 Ru ruthenium
use710.216202747
WEL710.216202747
CRC7.3605016.7628.47
45 Rh rhodium
use719.717402997
WEL719.717402997
CRC7.4589018.0831.06
46 Pd palladium
use804.418703177
WEL804.418703177
CRC8.336919.4332.93
47 Ag silver
use731.020703361
WEL731.020703361
CRC7.576221.4934.83
48 Cd cadmium
use867.81631.43616
WEL867.81631.43616
CRC8.993816.9083237.48
49 In indium
use558.31820.727045210
WEL558.31820.727045210
CRC5.7863618.869828.0354
50 Sn tin
use708.61411.82943.03930.37456
WEL708.61411.82943.03930.37456
CRC7.343914.6322530.5026040.7350272.28
51 Sb antimony
use8341594.924404260540010400
WEL8341594.924404260540010400
CRC8.608416.5305125.344.256108
52 Te tellurium
use869.31790269836105668682013200
WEL869.31790269836105668682013200
CRC9.009618.627.9637.4158.7570.7137
53 I iodine
use1008.41845.93180
WEL1008.41845.93180
CRC10.4512619.131333
54 Xe xenon
use1170.42046.43099.4
WEL1170.42046.43099.4
CRC12.129821.2097932.1230
55 Cs caesium
use375.72234.33400
WEL375.72234.33400
CRC3.8939023.15745
56 Ba barium
use502.9965.23600
WEL502.9965.23600
CRC5.2117010.00390
57 La lanthanum
use538.110671850.348195940
WEL538.110671850.348195940
CRC5.576911.06019.177349.9561.6
58 Ce cerium
use534.410501949354763257490
WEL534.410501949354763257490
CRC5.538710.8520.19836.75865.5577.6
59 Pr praseodymium
use5271020208637615551
WEL5271020208637615551
CRC5.47310.5521.62438.9857.53
60 Nd neodymium
use533.1104021303900
WEL533.1104021303900
CRC5.525010.7322.140.41
61 Pm promethium
use540105021503970
WEL540105021503970
CRC5.58210.9022.341.1
62 Sm samarium
use544.5107022603990
WEL544.5107022603990
CRC5.643611.0723.441.4
63 Eu europium
use547.1108524044120
WEL547.1108524044120
CRC5.670411.24124.9242.7
64 Gd gadolinium
use593.4117019904250
WEL593.4117019904250
CRC6.150112.0920.6344.0
65 Tb terbium
use565.8111021143839
WEL565.8111021143839
CRC5.863811.5221.9139.79
66 Dy dysprosium
use573.0113022003990
WEL573.0113022003990
CRC5.938911.6722.841.47
67 Ho holmium
use581.0114022044100
WEL581.0114022044100
CRC6.021511.8022.8442.5
68 Er erbium
use589.3115021944120
WEL589.3115021944120
CRC6.107711.9322.7442.7
69 Tm thulium
use596.7116022854120
WEL596.7116022854120
CRC6.1843112.0523.6842.7
70 Yb ytterbium
use603.41174.824174203
WEL603.41174.824174203
CRC6.2541612.176125.0543.56
71 Lu lutetium
use523.513402022.343706445
WEL523.513402022.343706445
CRC5.425913.920.959445.2566.8
72 Hf hafnium
use658.5144022503216
WEL658.5144022503216
CRC6.8250714.923.333.33
73 Ta tantalum
use7611500
WEL7611500
CRC7.5496
74 W tungsten
use7701700
WEL7701700
CRC7.8640
75 Re rhenium
use760126025103640
WEL760126025103640
CRC7.8335
76 Os osmium
use8401600
WEL8401600
CRC8.4382
77 Ir iridium
use8801600
WEL8801600
CRC8.9670
78 Pt platinum
use8701791
WEL8701791
CRC8.958718.56328[1]
79 Au gold
use890.11980
WEL890.11980
CRC9.225520.530[1]
80 Hg mercury
use1007.118103300
WEL1007.118103300
CRC10.4375018.75634.2
81 Tl thallium
use589.419712878
WEL589.419712878
CRC6.108220.42829.83
82 Pb lead
use715.61450.53081.540836640
WEL715.61450.53081.540836640
CRC7.4166615.032231.937342.3268.8
83 Bi bismuth
use70316102466437054008520
WEL70316102466437054008520
CRC7.285616.6925.5645.356.088.3
84 Po polonium
use812.1
WEL812.1
CRC8.417
85 At astatine
use899.003
WEL920
CRC
talk
Originally quoted as 9.31751(8) eV.
86 Rn radon
use1037
WEL1037
CRC10.74850
87 Fr francium
use380
WEL380
CRC4.0727
talkAndreev, S.V.; Letokhov, V.S.; Mishin, V.I. (1987). "Laser resonance photoionization spectroscopy of Rydberg levels in Fr". Phys. Rev. Lett. 59: 1274–76. Bibcode:1987PhRvL..59.1274A. doi:10.1103/PhysRevLett.59.1274. PMID 10035190. give 4.0712±0.00004 eV (392.811(4) kJ/mol)
88 Ra radium
use509.3979.0
WEL509.3979.0
CRC5.278410.14716
89 Ac actinium
use4991170
WEL4991170
CRC5.1712.1
90 Th thorium
use587111019302780
WEL587111019302780
CRC6.306711.520.028.8
91 Pa protactinium
use568
WEL568
CRC5.89
92 U uranium
use597.61420
WEL597.61420
CRC6.19405
93 Np neptunium
use604.5
WEL604.5
CRC6.2657
94 Pu plutonium
use584.7
WEL584.7
CRC6.0262
95 Am americium
use578
WEL578
CRC5.9738
96 Cm curium
use581
WEL581
CRC5.9915
97 Bk berkelium
use601
WEL601
CRC6.1979
98 Cf californium
use608
WEL608
CRC6.2817
99 Es einsteinium
use619
WEL619
CRC6.42
100 Fm fermium
use627
WEL627
CRC6.50
101 Md mendelevium
use635
WEL635
CRC6.58
102 No nobelium
use642
WEL
CRC6.65
103 Lr lawrencium
use470
WEL
CRC4.9
104 Rf rutherfordium
use580
WEL
CRC6.0

Notes

  • Values from CRC are ionization energies given in the unit eV; other values are molar ionization energies given in the unit kJ/mol. The first of these quantities is used in atomic physics, the second in chemistry, but both refer to the same basic property of the element. To convert from "value of ionization energy" to the corresponding "value of molar ionization energy", multiply the former by 96.48534 kJ/(eV·mol).

References

WEL

As quoted at http://www.webelements.com/ from these sources:

  • J.E. Huheey, E.A. Keiter, and R.L. Keiter in Inorganic Chemistry : Principles of Structure and Reactivity, 4th edition, HarperCollins, New York, USA, 1993.
  • A.M. James and M.P. Lord in Macmillan's Chemical and Physical Data, Macmillan, London, UK, 1992.

CRC

As quoted from various sources in an online version of:

  • David R. Lide (ed), CRC Handbook of Chemistry and Physics, 84th Edition. CRC Press. Boca Raton, Florida, 2003; Section 10, Atomic, Molecular, and Optical Physics; Ionization Potentials of Atoms and Atomic Ions

External links

See also

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