View source for Molar ionization energies of the elements

{{short description|Table of molar ionization energies for the chemical elements}}
These tables list values of [[ionization energy|molar ionization energies]], measured in [[kilojoule per mole|kJ⋅mol<sup>−1</sup>]]. This is the energy per mole necessary to remove [[electrons]] from gaseous [[atoms]] or atomic ions.  The first molar ionization energy applies to the neutral atoms. The second, third, etc., molar ionization energy applies to the further removal of an electron from a singly, doubly, etc., charged ion.  For ionization energies measured in the unit eV, see ''[[Ionization energies of the elements (data page)]]''. All data from [[rutherfordium]] onwards is predicted.

== 1st–10th ionization energies ==
{| class="wikitable sortable" style="font-size:90%;"
! Number !! Symbol !! Name
! 1st !! 2nd !! 3rd !! 4th !! 5th !! 6th !! 7th !! 8th !! 9th !! 10th
|-
| 1 || H || [[hydrogen]]
| <!--1st-->1312.0
|-
| 2 || He || [[helium]]
| <!--1st-->2372.3 || <!--2nd-->5250.5
|-
| 3 || Li || [[lithium]]
| <!--1st-->520.2 || <!--2nd-->7298.1 || <!--3rd-->11,815.0
|-
| 4 || Be || [[beryllium]]
| <!--1st-->899.5 || <!--2nd-->1757.1 || <!--3rd-->14,848.7 || <!--4th-->21,006.6
|-
| 5 || B || [[boron]]
| <!--1st-->800.6 || <!--2nd-->2427.1 || <!--3rd-->3659.7 || <!--4th-->25,025.8 || <!--5th-->32,826.7
|-
| 6 || C || [[carbon]]
| <!--1st-->1086.5 || <!--2nd-->2352.6 || <!--3rd-->4620.5 || <!--4th-->6222.7 || <!--5th-->37,831 || <!--6th-->47,277.0
|-
| 7 || N || [[nitrogen]]
| <!--1st-->1402.3 || <!--2nd-->2856 || <!--3rd-->4578.1 || <!--4th-->7475.0 || <!--5th-->9444.9 || <!--6th-->53,266.6 || <!--7th-->64,360
|-
| 8 || O || [[oxygen]]
| <!--1st-->1313.9 || <!--2nd-->3388.3 || <!--3rd-->5300.5 || <!--4th-->7469.2 || <!--5th-->10,989.5 || <!--6th-->13,326.5 || <!--7th-->71,330 || <!--8th-->84,078.0
|-
| 9 || F || [[fluorine]]
| <!--1st-->1681.0 || <!--2nd-->3374.2 || <!--3rd-->6050.4 || <!--4th-->8407.7 || <!--5th-->11,022.7 || <!--6th-->15,164.1 || <!--7th-->17,868 || <!--8th-->92,038.1 || <!--9th-->106,434.3
|-
| 10 || Ne || [[neon]]
| <!--1st-->2080.7 || <!--2nd-->3952.3|| <!--3rd-->6122 || <!--4th-->9371 || <!--5th-->12,177 || <!--6th-->15,238.90 || <!--7th-->19,999.0 || <!--8th-->23,069.5 || <!--9th-->115,379.5 || <!--10th-->131,432
|-
| 11 || Na || [[sodium]]
| <!--1st-->495.8 || <!--2nd-->4562 || <!--3rd-->6910.3 || <!--4th-->9543 || <!--5th-->13,354 || <!--6th-->16,613 || <!--7th-->20,117 || <!--8th-->25,496 || <!--9th-->28,932 || <!--10th-->141,362
|-
| 12 || Mg || [[magnesium]]
| <!--1st-->737.7 || <!--2nd-->1450.7 || <!--3rd-->7732.7 || <!--4th-->10,542.5 || <!--5th-->13,630 || <!--6th-->18,020 || <!--7th-->21,711 || <!--8th-->25,661 || <!--9th-->31,653 || <!--10th-->35,458
|-
| 13 || Al || [[aluminium]]
| <!--1st-->577.5 || <!--2nd-->1816.7 || <!--3rd-->2744.8 || <!--4th-->11,577 || <!--5th-->14,842 || <!--6th-->18,379 || <!--7th-->23,326 || <!--8th-->27,465 || <!--9th-->31,853 || <!--10th-->38,473
|-
| 14 || Si || [[silicon]]
| <!--1st-->786.5 || <!--2nd-->1577.1 || <!--3rd-->3231.6 || <!--4th-->4355.5 || <!--5th-->16,091 || <!--6th-->19,805 || <!--7th-->23,780 || <!--8th-->29,287 || <!--9th-->33,878 || <!--10th-->38,726
|-
| 15 || P || [[phosphorus]]
| <!--1st-->1011.8 || <!--2nd-->1907 || <!--3rd-->2914.1 || <!--4th-->4963.6 || <!--5th-->6273.9 || <!--6th-->21,267 || <!--7th-->25,431 || <!--8th-->29,872 || <!--9th-->35,905 || <!--10th-->40,950
|-
| 16 || S || [[sulfur]]
| <!--1st-->999.6 || <!--2nd-->2252 || <!--3rd-->3357 || <!--4th-->4556 || <!--5th-->7004.3 || <!--6th-->8495.8 || <!--7th-->27,107 || <!--8th-->31,719 || <!--9th-->36,621 || <!--10th-->43,177
|-
| 17 || Cl || [[chlorine]]
| <!--1st-->1251.2 || <!--2nd-->2298 || <!--3rd-->3822 || <!--4th-->5158.6 || <!--5th-->6542 || <!--6th-->9362 || <!--7th-->11,018 || <!--8th-->33,604 || <!--9th-->38,600 || <!--10th-->43,961
|-
| 18 || Ar || [[argon]]
| <!--1st-->1520.6 || <!--2nd-->2665.8 || <!--3rd-->3931 || <!--4th-->5771 || <!--5th-->7238 || <!--6th-->8781 || <!--7th-->11,995 || <!--8th-->13,842 || <!--9th-->40,760 || <!--10th-->46,186
|-
| 19 || K || [[potassium]]
| <!--1st-->418.8 || <!--2nd-->3052 || <!--3rd-->4420 || <!--4th-->5877 || <!--5th-->7975 || <!--6th-->9590 || <!--7th-->11,343 || <!--8th-->14,944 || <!--9th-->16,963.7 || <!--10th-->48,610
|-
| 20 || Ca || [[calcium]]
| <!--1st-->589.8 || <!--2nd-->1145.4 || <!--3rd-->4912.4 || <!--4th-->6491 || <!--5th-->8153 || <!--6th-->10,496 || <!--7th-->12,270 || <!--8th-->14,206 || <!--9th-->18,191 || <!--10th-->20,385
|-
| 21 || Sc || [[scandium]]
| <!--1st-->633.1 || <!--2nd-->1235.0 || <!--3rd-->2388.6 || <!--4th-->7090.6 || <!--5th-->8843 || <!--6th-->10,679 || <!--7th-->13,310 || <!--8th-->15,250 || <!--9th-->17,370 || <!--10th-->21,726
|-
| 22 || Ti || [[titanium]]
| <!--1st-->658.8 || <!--2nd-->1309.8 || <!--3rd-->2652.5 || <!--4th-->4174.6 || <!--5th-->9581 || <!--6th-->11,533 || <!--7th-->13,590 || <!--8th-->16,440 || <!--9th-->18,530 || <!--10th-->20,833
|-
| 23 || V || [[vanadium]]
| <!--1st-->650.9 || <!--2nd-->1414 || <!--3rd-->2830 || <!--4th-->4507 || <!--5th-->6298.7 || <!--6th-->12,363 || <!--7th-->14,530 || <!--8th-->16,730 || <!--9th-->19,860 || <!--10th-->22,240
|-
| 24 || Cr || [[chromium]]
| <!--1st-->652.9 || <!--2nd-->1590.6 || <!--3rd-->2987 || <!--4th-->4743 || <!--5th-->6702 || <!--6th-->8744.9 || <!--7th-->15,455 || <!--8th-->17,820 || <!--9th-->20,190 || <!--10th-->23,580
|-
| 25 || Mn || [[manganese]]
| <!--1st-->717.3 || <!--2nd-->1509.0 || <!--3rd-->3248 || <!--4th-->4940 || <!--5th-->6990 || <!--6th-->9220 || <!--7th-->11,500 || <!--8th-->18,770 || <!--9th-->21,400 || <!--10th-->23,960
|-
| 26 || Fe || [[iron]]
| <!--1st-->762.5 || <!--2nd-->1561.9 || <!--3rd-->2957 || <!--4th-->5290 || <!--5th-->7240 || <!--6th-->9560 || <!--7th-->12,060 || <!--8th-->14,580 || <!--9th-->22,540 || <!--10th-->25,290
|-
| 27 || Co || [[cobalt]]
| <!--1st-->760.4 || <!--2nd-->1648 || <!--3rd-->3232 || <!--4th-->4950 || <!--5th-->7670 || <!--6th-->9840 || <!--7th-->12,440 || <!--8th-->15,230 || <!--9th-->17,959 || <!--10th-->26,570
|-
| 28 || Ni || [[nickel]]
| <!--1st-->737.1 || <!--2nd-->1753.0 || <!--3rd-->3395 || <!--4th-->5300 || <!--5th-->7339 || <!--6th-->10,400 || <!--7th-->12,800 || <!--8th-->15,600 || <!--9th-->18,600 || <!--10th-->21,670
|-
| 29 || Cu || [[copper]]
| <!--1st-->745.5 || <!--2nd-->1957.9 || <!--3rd-->3555 || <!--4th-->5536 || <!--5th-->7700 || <!--6th-->9900 || <!--7th-->13,400 || <!--8th-->16,000 || <!--9th-->19,200 || <!--10th-->22,400
|-
| 30 || Zn || [[zinc]]
| <!--1st-->906.4 || <!--2nd-->1733.3 || <!--3rd-->3833 || <!--4th-->5731 || <!--5th-->7970 || <!--6th-->10,400 || <!--7th-->12,900 || <!--8th-->16,800 || <!--9th-->19,600 || <!--10th-->23,000
|-
| 31 || Ga || [[gallium]]
| <!--1st-->578.8 || <!--2nd-->1979.3 || <!--3rd-->2963 || <!--4th-->6180
|-
| 32 || Ge || [[germanium]]
| <!--1st-->762 || <!--2nd-->1537.5 || <!--3rd-->3302.1 || <!--4th-->4411 || <!--5th-->9020
|-
| 33 || As || [[arsenic]]
| <!--1st-->947.0 || <!--2nd-->1798 || <!--3rd-->2735 || <!--4th-->4837 || <!--5th-->6043 || <!--6th-->12,310
|-
| 34 || Se || [[selenium]]
| <!--1st-->941.0 || <!--2nd-->2045 || <!--3rd-->2973.7 || <!--4th-->4144 || <!--5th-->6590 || <!--6th-->7880 || <!--7th-->14,990
|-
| 35 || Br || [[bromine]]
| <!--1st-->1139.9 || <!--2nd-->2103 || <!--3rd-->3470 || <!--4th-->4560 || <!--5th-->5760 || <!--6th-->8550 || <!--7th-->9940 || <!--8th-->18,600
|-
| 36 || Kr || [[krypton]]
| <!--1st-->1350.8 || <!--2nd-->2350.4 || <!--3rd-->3565 || <!--4th-->5070 || <!--5th-->6240 || <!--6th-->7570 || <!--7th-->10,710 || <!--8th-->12,138 || <!--9th-->22,274 || <!--10th-->25,880
|-
| 37 || Rb || [[rubidium]]
| <!--1st-->403.0 || <!--2nd-->2633 || <!--3rd-->3860 || <!--4th-->5080 || <!--5th-->6850 || <!--6th-->8140 || <!--7th-->9570 || <!--8th-->13,120 || <!--9th-->14,500 || <!--10th-->26,740
|-
| 38 || Sr || [[strontium]]
| <!--1st-->549.5 || <!--2nd-->1064.2 || <!--3rd-->4138 || <!--4th-->5500 || <!--5th-->6910 || <!--6th-->8760 || <!--7th-->10,230 || <!--8th-->11,800 || <!--9th-->15,600 || <!--10th-->17,100
|-
| 39 || Y || [[yttrium]]
| <!--1st-->600 || <!--2nd-->1180 || <!--3rd-->1980 || <!--4th-->5847 || <!--5th-->7430 || <!--6th-->8970 || <!--7th-->11,190 || <!--8th-->12,450 || <!--9th-->14,110 || <!--10th-->18,400
|-
| 40 || Zr || [[zirconium]]
| <!--1st-->640.1 || <!--2nd-->1270 || <!--3rd-->2218 || <!--4th-->3313 || <!--5th-->7752 || <!--6th-->9500
|-
| 41 || Nb || [[niobium]]
| <!--1st-->652.1 || <!--2nd-->1380 || <!--3rd-->2416 || <!--4th-->3700 || <!--5th-->4877 || <!--6th-->9847 || <!--7th-->12,100
|-
| 42 || Mo || [[molybdenum]]
| <!--1st-->684.3 || <!--2nd-->1560 || <!--3rd-->2618 || <!--4th-->4480 || <!--5th-->5257 || <!--6th-->6640.8 || <!--7th-->12,125 || <!--8th-->13,860 || <!--9th-->15,835 || <!--10th-->17,980
|-
| 43 || Tc || [[technetium]]
| <!--1st-->686.9<ref>{{cite journal |last1=Mattolat |first1=C. |last2=Gottwald |first2=T. |first3=S. |last3=Raeder |first4=S. |last4=Rothe |first5=F. |last5=Schwellnus |first6=K. |last6=Wendt |first7=P. |last7=Thörle-Pospiech |first8=N. |last8=Trautmann |date=24 May 2010 |title=Determination of the first ionization potential of technetium |url= |journal=Physical Review A |volume=81 |issue= |pages=052513 |doi=10.1103/PhysRevA.81.052513 <!-- |access-date=1 October 2023 -->}}</ref> || <!--2nd-->1470 || <!--3rd-->2850
|-
| 44 || Ru || [[ruthenium]]
| <!--1st-->710.2 || <!--2nd-->1620 || <!--3rd-->2747
|-
| 45 || Rh || [[rhodium]]
| <!--1st-->719.7 || <!--2nd-->1740 || <!--3rd-->2997
|-
| 46 || Pd || [[palladium]]
| <!--1st-->804.4 || <!--2nd-->1870 || <!--3rd-->3177
|-
| 47 || Ag || [[silver]]
| <!--1st-->731.0 || <!--2nd-->2070 || <!--3rd-->3361
|-
| 48 || Cd || [[cadmium]]
| <!--1st-->867.8 || <!--2nd-->1631.4 || <!--3rd-->3616
|-
| 49 || In || [[indium]]
| <!--1st-->558.3 || <!--2nd-->1820.7 || <!--3rd-->2704 || <!--4th-->5210
|-
| 50 || Sn || [[tin]]
| <!--1st-->708.6 || <!--2nd-->1411.8 || <!--3rd-->2943.0 || <!--4th-->3930.3 || <!--5th-->7456
|-
| 51 || Sb || [[antimony]]
| <!--1st-->834 || <!--2nd-->1594.9 || <!--3rd-->2440 || <!--4th-->4260 || <!--5th-->5400 || <!--6th-->10,400
|-
| 52 || Te || [[tellurium]]
| <!--1st-->869.3 || <!--2nd-->1790 || <!--3rd-->2698 || <!--4th-->3610 || <!--5th-->5668 || <!--6th-->6820 || <!--7th-->13,200
|-
| 53 || I || [[iodine]]
| <!--1st-->1008.4 || <!--2nd-->1845.9 || <!--3rd-->3180
|-
| 54 || Xe || [[xenon]]
| <!--1st-->1170.4 || <!--2nd-->2046.4 || <!--3rd-->3099.4
|-
| 55 || Cs || [[caesium]]
| <!--1st-->375.7 || <!--2nd-->2234.3 || <!--3rd-->3400
|-
| 56 || Ba || [[barium]]
| <!--1st-->502.9 || <!--2nd-->965.2 || <!--3rd-->3600
|-
| 57 || La || [[lanthanum]]
| <!--1st-->538.1 || <!--2nd-->1067 || <!--3rd-->1850.3 || <!--4th-->4819 || <!--5th-->5940
|-
| 58 || Ce || [[cerium]]
| <!--1st-->534.4 || <!--2nd-->1050 || <!--3rd-->1949 || <!--4th-->3547 || <!--5th-->6325 || <!--6th-->7490
|-
| 59 || Pr || [[praseodymium]]
| <!--1st-->527 || <!--2nd-->1020 || <!--3rd-->2086 || <!--4th-->3761 || <!--5th-->5551
|-
| 60 || Nd || [[neodymium]]
| <!--1st-->533.1 || <!--2nd-->1040 || <!--3rd-->2130 || <!--4th-->3900
|-
| 61 || Pm || [[promethium]]
| <!--1st-->540 || <!--2nd-->1050 || <!--3rd-->2150 || <!--4th-->3970
|-
| 62 || Sm || [[samarium]]
| <!--1st-->544.5 || <!--2nd-->1070 || <!--3rd-->2260 || <!--4th-->3990
|-
| 63 || Eu || [[europium]]
| <!--1st-->547.1 || <!--2nd-->1085 || <!--3rd-->2404 || <!--4th-->4120
|-
| 64 || Gd || [[gadolinium]]
| <!--1st-->593.4 || <!--2nd-->1170 || <!--3rd-->1990 || <!--4th-->4250
|-
| 65 || Tb || [[terbium]]
| <!--1st-->565.8 || <!--2nd-->1110 || <!--3rd-->2114 || <!--4th-->3839
|-
| 66 || Dy || [[dysprosium]]
| <!--1st-->573.0 || <!--2nd-->1130 || <!--3rd-->2200 || <!--4th-->3990
|-
| 67 || Ho || [[holmium]]
| <!--1st-->581.0 || <!--2nd-->1140 || <!--3rd-->2204 || <!--4th-->4100
|-
| 68 || Er || [[erbium]]
| <!--1st-->589.3 || <!--2nd-->1150 || <!--3rd-->2194 || <!--4th-->4120
|-
| 69 || Tm || [[thulium]]
| <!--1st-->596.7 || <!--2nd-->1160 || <!--3rd-->2285 || <!--4th-->4120
|-
| 70 || Yb || [[ytterbium]]
| <!--1st-->603.4 || <!--2nd-->1174.8 || <!--3rd-->2417 || <!--4th-->4203
|-
| 71 || Lu || [[lutetium]]
| <!--1st-->523.5 || <!--2nd-->1340 || <!--3rd-->2022.3 || <!--4th-->4370 || <!--5th-->6445
|-
| 72 || Hf || [[hafnium]]
| <!--1st-->658.5 || <!--2nd-->1440 || <!--3rd-->2250 || <!--4th-->3216
|-
| 73 || Ta || [[tantalum]]
| <!--1st-->761 || <!--2nd-->1500
|-
| 74 || W || [[tungsten]]
| <!--1st-->770 || <!--2nd-->1700
|-
| 75 || Re || [[rhenium]]
| <!--1st-->760 || <!--2nd-->1260 || <!--3rd-->2510 || <!--4th-->3640
|-
| 76 || Os || [[osmium]]
| <!--1st-->840 || <!--2nd-->1600
|-
| 77 || Ir || [[iridium]]
| <!--1st-->880 || <!--2nd-->1600
|-
| 78 || Pt || [[platinum]]
| <!--1st-->870 || <!--2nd-->1791
|-
| 79 || Au || [[gold]]
| <!--1st-->890.1 || <!--2nd-->1980
|-
| 80 || Hg || [[mercury (element)|mercury]]
| <!--1st-->1007.1 || <!--2nd-->1810 || <!--3rd-->3300
|-
| 81 || Tl || [[thallium]]
| <!--1st-->589.4 || <!--2nd-->1971 || <!--3rd-->2878
|-
| 82 || Pb || [[lead]]
| <!--1st-->715.6 || <!--2nd-->1450.5 || <!--3rd-->3081.5 || <!--4th-->4083 || <!--5th-->6640
|-
| 83 || Bi || [[bismuth]]
| <!--1st-->703 || <!--2nd-->1610 || <!--3rd-->2466 || <!--4th-->4370 || <!--5th-->5400 || <!--6th-->8520
|-
| 84 || Po || [[polonium]]
| <!--1st-->812.1
|-
| 85 || At || [[astatine]]
| <!--1st-->899.003
|-
| 86 || Rn || [[radon]]
| <!--1st-->1037
|-
| 87 || Fr || [[francium]]
| <!--1st-->393
|-
| 88 || Ra || [[radium]]
| <!--1st-->509.3 || <!--2nd-->979.0
|-
| 89 || Ac || [[actinium]]
| <!--1st-->499 || <!--2nd-->1170||<!--3rd-->1900||<!--4th-->4700
|-
| 90 || Th || [[thorium]]
| <!--1st-->587 || <!--2nd-->1110 || <!--3rd-->1978 || <!--4th-->2780
|-
| 91 || Pa || [[protactinium]]
| <!--1st-->568||<!--2nd-->1128|| <!--3rd-->1814 ||<!--4th-->2991
|-
| 92 || U || [[uranium]]
| <!--1st-->597.6 || <!--2nd-->1420|| <!--3rd-->1900  ||<!--4th-->3145
|-
| 93 || Np || [[neptunium]]
| <!--1st-->604.5|| <!--2nd-->1128|| <!--3rd-->1997  ||<!--4th-->3242
|-
| 94 || Pu || [[plutonium]]
| <!--1st-->584.7|| <!--2nd-->1128|| <!--3rd-->2084  ||<!--4th-->3338
|-
| 95 || Am || [[americium]]
| <!--1st-->578|| <!--2nd-->1158|| <!--3rd-->2132  ||<!--4th-->3493
|-
| 96 || Cm || [[curium]]
| <!--1st-->581|| <!--2nd-->1196|| <!--3rd-->2026  ||<!--4th-->3550
|-
| 97 || Bk || [[berkelium]]
| <!--1st-->601|| <!--2nd-->1186|| <!--3rd-->2152  ||<!--4th-->3434
|-
| 98 || Cf || [[californium]]
| <!--1st-->608|| <!--2nd-->1206|| <!--3rd-->2267  ||<!--4th-->3599
|-
| 99 || Es || [[einsteinium]]
| <!--1st-->619|| <!--2nd-->1216|| <!--3rd-->2334  ||<!--4th-->3734
|-
| 100 || Fm || [[fermium]]
| <!--1st-->629|| <!--2nd-->1225|| <!--3rd-->2363  ||<!--4th-->3792
|-
| 101 || Md || [[mendelevium]]
| <!--1st-->636|| <!--2nd-->1235|| <!--3rd-->2470  ||<!--4th-->3840
|-
| 102 || No || [[nobelium]]
| <!--1st-->639|| <!--2nd-->1254|| <!--3rd-->2643  ||<!--4th-->3956
|-
| 103 || Lr || [[lawrencium]]
| <!--1st-->479|| <!--2nd-->1428|| <!--3rd-->2228  ||<!--4th-->4910
|-
| 104 || Rf || [[rutherfordium]]
| <!--1st-->580 || <!--2nd-->1390 || <!--3rd-->2300 || <!--4th-->3080
|-
| 105 || Db || [[dubnium]]
| <!--1st-->665 || <!--2nd-->1547 || <!--3rd-->2378 || <!--4th-->3299 || <!--5th-->4305
|-
| 106 || Sg || [[seaborgium]]
| <!--1st-->757 || <!--2nd-->1733 || <!--3rd-->2484 || <!--4th-->3416 || <!--5th-->4562 || <!--6th-->5716
|-
| 107 || Bh || [[bohrium]]
| <!--1st-->740 || <!--2nd-->1690 || <!--3rd-->2570 || <!--4th-->3600 || <!--5th-->4730 || <!--6th-->5990 || <!--7th-->7230
|-
| 108 || Hs || [[hassium]]
| <!--1st-->730 || <!--2nd-->1760 || <!--3rd-->2830 || <!--4th-->3640 || <!--5th-->4940 || <!--6th-->6180 || <!--7th-->7540 || <!--8th-->8860
|-
| 109 || Mt || [[meitnerium]]
| <!--1st-->800 || <!--2nd-->1820 || <!--3rd-->2900 || <!--4th-->3900 || <!--5th-->4900
|-
| 110 || Ds || [[darmstadtium]]
| <!--1st-->960 || <!--2nd-->1890 || <!--3rd-->3030 || <!--4th-->4000 || <!--5th-->5100
|-
| 111 || Rg || [[roentgenium]]
| <!--1st-->1020 || <!--2nd-->2070 || <!--3rd-->3080 || <!--4th-->4100 || <!--5th-->5300
|-
| 112 || Cn || [[copernicium]]
| <!--1st-->1155 || <!--2nd-->2170 || <!--3rd-->3160 || <!--4th-->4200 || <!--5th-->5500
|-
| 113 || Nh || [[nihonium]]
| <!--1st-->707.2 || <!--2nd-->2309 || <!--3rd-->3020 || <!--4th-->4382 || <!--5th-->5638
|-
| 114 || Fl || [[flerovium]]
| <!--1st-->832.2 || <!--2nd-->1600 || <!--3rd-->3370 || <!--4th-->4400 || <!--5th-->5850
|-
| 115 || Mc || [[moscovium]]
| <!--1st-->538.3 || <!--2nd-->1760 || <!--3rd-->2650 || <!--4th-->4680 || <!--5th-->5720
|-
| 116 || Lv || [[livermorium]]
| <!--1st-->663.9 || <!--2nd-->1330 || <!--3rd-->2850 || <!--4th-->3810 || <!--5th-->6080
|-
| 117 || Ts || [[tennessine]]
| <!--1st-->736.9 || <!--2nd-->1435.4 || <!--3rd-->2161.9 || <!--4th-->4012.9 || <!--5th-->5076.4
|-
| 118 || Og || [[oganesson]]
| <!--1st-->860.1 || <!--2nd-->1560
|-
| 119 || Uue || [[ununennium]]
| <!--1st-->463.1 || <!--2nd-->1700
|-
| 120 || Ubn || [[unbinilium]]
| <!--1st-->563.3 || <!--2nd-->{{sort|907|895–<br>&nbsp;919}}
|-
| 121 || Ubu || [[unbiunium]]
| <!--1st-->429.4 || <!--2nd--> 1110 || <!--3rd--> 1710 || <!--4th--> 4270
|-
| 122 || Ubb || [[unbibium]]
| <!--1st-->545 || <!--2nd--> 1090 || <!--3rd--> 1848 || <!--4th--> 2520
|}

== 11th&ndash;20th ionisation energies ==
{| class="wikitable sortable" style="font-size:90%;"
! number !! symbol !! name
! 11th !! 12th !! 13th !! 14th !! 15th !! 16th !! 17th !! 18th !! 19th !! 20th
|-
| 11 || Na || [[sodium]]
| <!--11th-->159,076
|-
| 12 || Mg || [[magnesium]]
| <!--11th-->169,988 || <!--12th-->189,368
|-
| 13 || Al || [[aluminium]]
| <!--11th-->42,647 || <!--12th-->201,266|| <!--13th-->222,316
|-
| 14 || Si || [[silicon]]
| <!--11th-->45,962 || <!--12th-->50,502 || <!--13th-->235,196 || <!--14th-->257,923
|-
| 15 || P || [[phosphorus]]
| <!--11th-->46,261 || <!--12th-->54,110 || <!--13th-->59,024 || <!--14th-->271,791 || <!--15th-->296,195
|-
| 16 || S || [[sulfur]]
| <!--11th-->48,710 || <!--12th-->54,460 || <!--13th-->62,930 || <!--14th-->68,216 || <!--15th-->311,048 || <!--16th-->337,138
|-
| 17 || Cl || [[chlorine]]
| <!--11th-->51,068 || <!--12th-->57,119 || <!--13th-->63,363 || <!--14th-->72,341 || <!--15th-->78,095 || <!--16th-->352,994 || <!--17th-->380,760
|-
| 18 || Ar || [[argon]]
| <!--11th-->52,002 || <!--12th-->59,653 || <!--13th-->66,199 || <!--14th-->72,918 || <!--15th-->82,473 || <!--16th-->88,576 || <!--17th-->397,605 || <!--18th-->427,066
|-
| 19 || K || [[potassium]]
| <!--11th-->54,490 || <!--12th-->60,730 || <!--13th-->68,950 || <!--14th-->75,900 || <!--15th-->83,080 || <!--16th-->93,400 || <!--17th-->99,710 || <!--18th-->444,880 || <!--19th-->476,063
|-
| 20 || Ca || [[calcium]]
| <!--11th-->57,110 || <!--12th-->63,410 || <!--13th-->70,110 || <!--14th-->78,890 || <!--15th-->86,310 || <!--16th-->94,000 || <!--17th-->104,900 || <!--18th-->111,711 || <!--19th-->494,850 || <!--20th-->527,762
|-
| 21 || Sc || [[scandium]]
| <!--11th-->24,102 || <!--12th-->66,320 || <!--13th-->73,010 || <!--14th-->80,160 || <!--15th-->89,490 || <!--16th-->97,400 || <!--17th-->105,600 || <!--18th-->117,000 || <!--19th-->124,270 || <!--20th-->547,530
|-
| 22 || Ti || [[titanium]]
| <!--11th-->25,575 || <!--12th-->28,125 || <!--13th-->76,015 || <!--14th-->83,280 || <!--15th-->90,880 || <!--16th-->100,700 || <!--17th-->109,100 || <!--18th-->117,800 || <!--19th-->129,900 || <!--20th-->137,530
|-
| 23 || V || [[vanadium]]
| <!--11th-->24,670 || <!--12th-->29,730 || <!--13th-->32,446 || <!--14th-->86,450 || <!--15th-->94,170 || <!--16th-->102,300 || <!--17th-->112,700 || <!--18th-->121,600 || <!--19th-->130,700 || <!--20th-->143,400
|-
| 24 || Cr || [[chromium]]
| <!--11th-->26,130 || <!--12th-->28,750 || <!--13th-->34,230 || <!--14th-->37,066 || <!--15th-->97,510 || <!--16th-->105,800 || <!--17th-->114,300 || <!--18th-->125,300 || <!--19th-->134,700 || <!--20th-->144,300
|-
| 25 || Mn || [[manganese]]
| <!--11th-->27,590 || <!--12th-->30,330 || <!--13th-->33,150 || <!--14th-->38,880 || <!--15th-->41,987 || <!--16th-->109,480 || <!--17th-->118,100 || <!--18th-->127,100 || <!--19th-->138,600 || <!--20th-->148,500
|-
| 26 || Fe || [[iron]]
| <!--11th-->28,000 || <!--12th-->31,920 || <!--13th-->34,830 || <!--14th-->37,840 || <!--15th-->44,100 || <!--16th-->47,206 || <!--17th-->122,200 || <!--18th-->131,000 || <!--19th-->140,500 || <!--20th-->152,600
|-
| 27 || Co || [[cobalt]]
| <!--11th-->29,400 || <!--12th-->32,400 || <!--13th-->36,600 || <!--14th-->39,700 || <!--15th-->42,800 || <!--16th-->49,396 || <!--17th-->52,737 || <!--18th-->134,810 || <!--19th-->145,170 || <!--20th-->154,700
|-
| 28 || Ni || [[nickel]]
| <!--11th-->30,970 || <!--12th-->34,000 || <!--13th-->37,100 || <!--14th-->41,500 || <!--15th-->44,800 || <!--16th-->48,100 || <!--17th-->55,101 || <!--18th-->58,570 || <!--19th-->148,700 || <!--20th-->159,000
|-
| 29 || Cu || [[copper]]
| <!--11th-->25,600 || <!--12th-->35,600 || <!--13th-->38,700 || <!--14th-->42,000 || <!--15th-->46,700 || <!--16th-->50,200 || <!--17th-->53,700 || <!--18th-->61,100 || <!--19th-->64,702 || <!--20th-->163,700
|-
| 30 || Zn || [[zinc]]
| <!--11th-->26,400 || <!--12th-->29,990 || <!--13th-->40,490 || <!--14th-->43,800 || <!--15th-->47,300 || <!--16th-->52,300 || <!--17th-->55,900 || <!--18th-->59,700 || <!--19th-->67,300 || <!--20th-->71,200
|-
| 36 || Kr || [[krypton]]
| <!--11th-->29,700 || <!--12th-->33,800 || <!--13th-->37,700 || <!--14th-->43,100 || <!--15th-->47,500 || <!--16th-->52,200 || <!--17th-->57,100 || <!--18th-->61,800 || <!--19th-->75,800 || <!--20th-->80,400
|-
| 38 || Sr || [[strontium]]
| <!--11th-->31,270
|-
| 39 || Y || [[yttrium]]
| <!--11th-->19,900 || <!--12th-->36,090
|-
| 42 || Mo || [[molybdenum]]
| <!--11th-->20,190 || <!--12th-->22,219 || <!--13th-->26,930 || <!--14th-->29,196 || <!--15th-->52,490 || <!--16th-->55,000 || <!--17th-->61,400 || <!--18th-->67,700 || <!--19th-->74,000 || <!--20th-->80,400
|}

== 21st&ndash;30th ionisation energies ==
{| class="wikitable sortable" style="font-size:90%;"
! number !! symbol !! name
! 21st !! 22nd !! 23rd !! 24th !! 25th !! 26th !! 27th !! 28th !! 29th !! 30th
|-
| 21 || Sc || [[scandium]]
| <!--21st-->582,163
|-
| 22 || Ti || [[titanium]]
| <!--21st-->602,930 || <!--22nd-->639,294
|-
| 23 || V || [[vanadium]]
| <!--21st-->151,440 || <!--22nd-->661,050 || <!--23rd-->699,144
|-
| 24 || Cr || [[chromium]]
| <!--21st-->157,700 || <!--22nd-->166,090 || <!--23rd-->721,870 || <!--24th-->761,733
|-
| 25 || Mn || [[manganese]]
| <!--21st-->158,600 || <!--22nd-->172,500 || <!--23rd-->181,380 || <!--24th-->785,450 || <!--25th-->827,067
|-
| 26 || Fe || [[iron]]
| <!--21st-->163,000 || <!--22nd-->173,600 || <!--23rd-->188,100 || <!--24th-->195,200 || <!--25th-->851,800 || <!--26th-->895,161
|-
| 27 || Co || [[cobalt]]
| <!--21st-->167,400 || <!--22nd-->178,100 || <!--23rd-->189,300 || <!--24th-->204,500 || <!--25th-->214,100 || <!--26th-->920,870 || <!--27th-->966,023
|-
| 28 || Ni || [[nickel]]
| <!--21st-->169,400 || <!--22nd-->182,700 || <!--23rd-->194,000 || <!--24th-->205,600 || <!--25th-->221,400 || <!--26th-->231,490 || <!--27th-->992,718 || <!--28th-->1,039,668
|-
| 29 || Cu || [[copper]]
| <!--21st-->174,100 || <!--22nd-->184,900 || <!--23rd-->198,800 || <!--24th-->210,500 || <!--25th-->222,700 || <!--26th-->239,100 || <!--27th-->249,660 || <!--28th-->1,067,358 || <!--29th-->1,116,105
|-
| 30 || Zn || [[zinc]]
| <!--21st-->179,100
|-
| 36 || Kr || [[krypton]]
| <!--21st-->85,300 || <!--22nd-->90,400 || <!--23rd-->96,300 || <!--24th-->101,400 || <!--25th-->111,100 || <!--26th-->116,290 || <!--27th-->282,500 || <!--28th-->296,200 || <!--29th-->311,400 || <!--30th-->326,200
|-
| 42 || Mo || [[molybdenum]]
| <!--21st-->87,000 || <!--22nd-->93,400 || <!--23rd-->98,420 || <!--24th-->104,400 || <!--25th-->121,900 || <!--26th-->127,700 || <!--27th-->133,800 || <!--28th-->139,800 || <!--29th-->148,100 || <!--30th-->154,500
|}

== References ==
* [[Ionization energies of the elements (data page)]]
* {{cite book| title=The Chemistry of the Actinide and Transactinide Elements| editor1-last=Morss|editor2-first=Norman M.| editor2-last=Edelstein| editor3-last=Fuger|editor3-first=Jean| last1=Hoffman|first1=Darleane C. |last2=Lee |first2=Diana M. |last3=Pershina |first3=Valeria |chapter=Transactinides and the future elements| publisher= [[Springer Science+Business Media]]| year=2006| isbn=1-4020-3555-1| location=Dordrecht, The Netherlands| edition=3rd| ref=CITEREFHaire2006}} (for predictions)
* {{cite book |last=Cotton |first=Simon |year=2006 |title=Lanthanide and Actinide Chemistry|publisher= John Wiley & Sons Ltd}}
* {{cite journal |last1=Fricke |first1=Burkhard |year=1975 |title=Superheavy elements: a prediction of their chemical and physical properties |journal=Recent Impact of Physics on Inorganic Chemistry |series=Structure and Bonding |volume=21 |pages=89–144 |doi=10.1007/BFb0116498 |isbn=978-3-540-07109-9 |url=https://www.researchgate.net/publication/225672062 |access-date=4 October 2013}} (for predictions)

{{reflist}}

{{Navbox elements data}}

[[Category:Properties of chemical elements]]