Ionization Energies of all the elements in the Periodic Table

Ionization Energies of all the elements in the Periodic Table

Refer to graph, table and property element trend below for Ionization Energies of all the elements in the periodic table. We have shown the Ionization Energies of the elements for which reliable data is available.

Ionization Energies Graph - Ionization Energies of all the elements in graph

Mouseover on the chart to see the element name and Ionization Energies of the element. The chart shows Ionization Energies in kJ/mol

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Ionization Energies Chart - Ionization Energies of all the elements in table chart

This Ionization Energies chart table gives the Ionization Energies of all the elements of periodic table in kJ/mol. Click on 'Element Atomic Number', 'Element Symbol', 'Element Name' and 'Element Ionization Energies' headers to sort.

Element Element
Ionization Energies
1 H - Hydrogen 1312 kJ/mol
2 He - Helium 2372.3, 5250.5 kJ/mol
3 Li - Lithium 520.2, 7298.1, 11815 kJ/mol
4 Be - Beryllium 899.5, 1757.1, 14848.7, 21006.6 kJ/mol
5 B - Boron 800.6, 2427.1, 3659.7, 25025.8, 32826.7 kJ/mol
6 C - Carbon 1086.5, 2352.6, 4620.5, 6222.7, 37831, 47277 kJ/mol
7 N - Nitrogen 1402.3, 2856, 4578.1, 7475, 9444.9, 53266.6, 64360 kJ/mol
8 O - Oxygen 1313.9, 3388.3, 5300.5, 7469.2, 10989.5, 13326.5, 71330, 84078 kJ/mol
9 F - Fluorine 1681, 3374.2, 6050.4, 8407.7, 11022.7, 15164.1, 17868, 92038.1, 106434.3 kJ/mol
10 Ne - Neon 2080.7, 3952.3, 6122, 9371, 12177, 15238, 19999, 23069.5, 115379.5, 131432 kJ/mol
11 Na - Sodium 495.8, 4562, 6910.3, 9543, 13354, 16613, 20117, 25496, 28932, 141362 kJ/mol
12 Mg - Magnesium 737.7, 1450.7, 7732.7, 10542.5, 13630, 18020, 21711, 25661, 31653, 35458 kJ/mol
13 Al - Aluminium 577.5, 1816.7, 2744.8, 11577, 14842, 18379, 23326, 27465, 31853, 38473 kJ/mol
14 Si - Silicon 786.5, 1577.1, 3231.6, 4355.5, 16091, 19805, 23780, 29287, 33878, 38726 kJ/mol
15 P - Phosphorus 1011.8, 1907, 2914.1, 4963.6, 6273.9, 21267, 25431, 29872, 35905, 40950 kJ/mol
16 S - Sulfur 999.6, 2252, 3357, 4556, 7004.3, 8495.8, 27107, 31719, 36621, 43177 kJ/mol
17 Cl - Chlorine 1251.2, 2298, 3822, 5158.6, 6542, 9362, 11018, 33604, 3.86×104, 43961 kJ/mol
18 Ar - Argon 1520.6, 2665.8, 3931, 5771, 7238, 8781, 11995, 13842, 40760, 46186 kJ/mol
19 K - Potassium 418.8, 3052, 4420, 5877, 7975, 9590, 11343, 14944, 16963.7, 48610 kJ/mol
20 Ca - Calcium 589.8, 1145.4, 4912.4, 6491, 8153, 10496, 12270, 14206, 18191, 20385, 57110 kJ/mol
21 Sc - Scandium 633.1, 1235, 2388.6, 7090.6, 8843, 10679, 13310, 15250, 17370, 21726, 24102, 66320, 73010, 80160, 89490, 9.74×104, 1.056×105, 1.17×105, 124270, 547530, 582163 kJ/mol
22 Ti - Titanium 658.8, 1309.8, 2652.5, 4174.6, 9581, 11533, 13590, 16440, 18530, 20833, 25575, 28125, 76015, 83280, 90880, 1.007×105, 1.091×105, 1.178×105, 1.299×105, 137530, 602930 kJ/mol
23 V - Vanadium 650.9, 1414, 2830, 4507, 6298.7, 12363, 14530, 16730, 19860, 22240, 24670, 29730, 32446, 86450, 94170, 1.023×105, 1.127×105, 1.216×105, 1.307×105, 1.434×105, 151440 kJ/mol
24 Cr - Chromium 652.9, 1590.6, 2987, 4743, 6702, 8744.9, 15455, 17820, 20190, 23580, 26130, 28750, 34230, 37066, 97510, 1.058×105, 1.143×105, 1.253×105, 1.347×105, 1.443×105, 1.577×105 kJ/mol
25 Mn - Manganese 717.3, 1509, 3248, 4940, 6990, 9220, 1.15×104, 18770, 2.14×104, 23960, 27590, 30330, 33150, 38880, 41987, 109480, 1.181×105, 1.271×105, 1.386×105, 1.485×105, 1.586×105 kJ/mol
26 Fe - Iron 762.5, 1561.9, 2957, 5290, 7240, 9560, 12060, 14580, 22540, 25290, 2.8×104, 31920, 34830, 37840, 4.41×104, 47206, 1.222×105, 1.31×105, 1.405×105, 1.526×105, 1.63×105 kJ/mol
27 Co - Cobalt 760.4, 1648, 3232, 4950, 7670, 9840, 12440, 15230, 17959, 26570, 2.94×104, 3.24×104, 3.66×104, 3.97×104, 4.28×104, 49396, 52737, 134810, 145170, 1.547×105, 1.674×105 kJ/mol
28 Ni - Nickel 737.1, 1753, 3395, 5.3×103, 7339, 1.04×104, 1.28×104, 1.56×104, 1.86×104, 21670, 30970, 3.4×104, 3.71×104, 4.15×104, 4.48×104, 4.81×104, 55101, 58570, 1.487×105, 1.59×105, 1.694×105 kJ/mol
29 Cu - Copper 745.5, 1957.9, 3555, 5536, 7.7×103, 9.9×103, 1.34×104, 1.6×104, 1.92×104, 2.24×104, 2.56×104, 3.56×104, 3.87×104, 4.2×104, 4.67×104, 5.02×104, 5.37×104, 6.11×104, 64702, 1.637×105, 1.741×105 kJ/mol
30 Zn - Zinc 906.4, 1733.3, 3833, 5731, 7970, 1.04×104, 1.29×104, 1.68×104, 1.96×104, 2.3×104, 2.64×104, 29990, 40490, 4.38×104, 4.73×104, 5.23×104, 5.59×104, 5.97×104, 6.73×104, 7.12×104, 1.791×105 kJ/mol
31 Ga - Gallium 578.8, 1979.3, 2963, 6180 kJ/mol
32 Ge - Germanium 762, 1537.5, 3302.1, 4411, 9020 kJ/mol
33 As - Arsenic 947, 1798, 2735, 4837, 6043, 12310 kJ/mol
34 Se - Selenium 941, 2045, 2973.7, 4144, 6590, 7880, 14990 kJ/mol
35 Br - Bromine 1139.9, 2103, 3470, 4560, 5760, 8550, 9940, 1.86×104 kJ/mol
36 Kr - Krypton 1350.8, 2350.4, 3565, 5070, 6240, 7570, 10710, 12138, 22274, 25880, 2.97×104, 3.38×104, 3.77×104, 4.31×104, 4.75×104, 5.22×104, 5.71×104, 6.18×104, 7.58×104, 8.04×104, 8.53×104 kJ/mol
37 Rb - Rubidium 403, 2633, 3860, 5080, 6850, 8140, 9570, 13120, 1.45×104, 26740 kJ/mol
38 Sr - Strontium 549.5, 1064.2, 4138, 5.5×103, 6910, 8760, 10230, 1.18×104, 1.56×104, 1.71×104 kJ/mol
39 Y - Yttrium 600, 1180, 1980, 5847, 7430, 8970, 11190, 12450, 14110, 1.84×104 kJ/mol
40 Zr - Zirconium 640.1, 1270, 2218, 3313, 7752, 9.5×103 kJ/mol
41 Nb - Niobium 652.1, 1380, 2416, 3.7×103, 4877, 9847, 1.21×104 kJ/mol
42 Mo - Molybdenum 684.3, 1560, 2618, 4480, 5257, 6640.8, 12125, 13860, 15835, 17980, 20190, 22219, 26930, 29196, 52490, 5.5×104, 6.14×104, 6.77×104, 7.4×104, 8.04×104, 8.7×104 kJ/mol
43 Tc - Technetium 702, 1470, 2850 kJ/mol
44 Ru - Ruthenium 710.2, 1620, 2747 kJ/mol
45 Rh - Rhodium 719.7, 1740, 2997 kJ/mol
46 Pd - Palladium 804.4, 1870, 3177 kJ/mol
47 Ag - Silver 731, 2070, 3361 kJ/mol
48 Cd - Cadmium 867.8, 1631.4, 3616 kJ/mol
49 In - Indium 558.3, 1820.7, 2704, 5210 kJ/mol
50 Sn - Tin 708.6, 1411.8, 2943, 3930.3, 7456 kJ/mol
51 Sb - Antimony 834, 1594.9, 2440, 4260, 5.4×103, 1.04×104 kJ/mol
52 Te - Tellurium 869.3, 1790, 2698, 3610, 5668, 6820, 1.32×104 kJ/mol
53 I - Iodine 1008.4, 1845.9, 3180 kJ/mol
54 Xe - Xenon 1170.4, 2046.4, 3099.4 kJ/mol
55 Cs - Cesium 375.7, 2234.3, 3.4×103 kJ/mol
56 Ba - Barium 502.9, 965.2, 3.6×103 kJ/mol
57 La - Lanthanum 538.1, 1067, 1850.3, 4819, 5940 kJ/mol
58 Ce - Cerium 534.4, 1050, 1949, 3547, 6325, 7490 kJ/mol
59 Pr - Praseodymium 527, 1020, 2086, 3761, 5551 kJ/mol
60 Nd - Neodymium 533.1, 1040, 2130, 3.9×103 kJ/mol
61 Pm - Promethium 540, 1050, 2150, 3970 kJ/mol
62 Sm - Samarium 544.5, 1070, 2260, 3990 kJ/mol
63 Eu - Europium 547.1, 1085, 2404, 4120 kJ/mol
64 Gd - Gadolinium 593.4, 1170, 1990, 4250 kJ/mol
65 Tb - Terbium 565.8, 1110, 2114, 3839 kJ/mol
66 Dy - Dysprosium 573, 1130, 2.2×103, 3990 kJ/mol
67 Ho - Holmium 581, 1140, 2204, 4.1×103 kJ/mol
68 Er - Erbium 589.3, 1150, 2194, 4120 kJ/mol
69 Tm - Thulium 596.7, 1160, 2285, 4120 kJ/mol
70 Yb - Ytterbium 603.4, 1174.8, 2417, 4203 kJ/mol
71 Lu - Lutetium 523.5, 1340, 2022.3, 4370, 6445 kJ/mol
72 Hf - Hafnium 658.5, 1440, 2250, 3216 kJ/mol
73 Ta - Tantalum 761, 1.5×103 kJ/mol
74 W - Tungsten 770, 1.7×103 kJ/mol
75 Re - Rhenium 760, 1260, 2510, 3640 kJ/mol
76 Os - Osmium 840, 1.6×103 kJ/mol
77 Ir - Iridium 880, 1.6×103 kJ/mol
78 Pt - Platinum 870, 1791 kJ/mol
79 Au - Gold 890.1, 1980 kJ/mol
80 Hg - Mercury 1007.1, 1810, 3.3×103 kJ/mol
81 Tl - Thallium 589.4, 1971, 2878 kJ/mol
82 Pb - Lead 715.6, 1450.5, 3081.5, 4083, 6640 kJ/mol
83 Bi - Bismuth 703, 1610, 2466, 4370, 5.4×103, 8520 kJ/mol
84 Po - Polonium 812.1 kJ/mol
85 At - Astatine 920 kJ/mol
86 Rn - Radon 1037 kJ/mol
87 Fr - Francium 380 kJ/mol
88 Ra - Radium 509.3, 979 kJ/mol
89 Ac - Actinium 499, 1170 kJ/mol
90 Th - Thorium 587, 1110, 1930, 2780 kJ/mol
91 Pa - Protactinium 568 kJ/mol
92 U - Uranium 597.6, 1420 kJ/mol
93 Np - Neptunium 604.5 kJ/mol
94 Pu - Plutonium 584.7 kJ/mol
95 Am - Americium 578 kJ/mol
96 Cm - Curium 581 kJ/mol
97 Bk - Berkelium 601 kJ/mol
98 Cf - Californium 608 kJ/mol
99 Es - Einsteinium 619 kJ/mol
100 Fm - Fermium 627 kJ/mol
101 Md - Mendelevium 635 kJ/mol
102 No - Nobelium 642 kJ/mol
103 Lr - Lawrencium N/A
104 Rf - Rutherfordium N/A
105 Db - Dubnium N/A
106 Sg - Seaborgium N/A
107 Bh - Bohrium N/A
108 Hs - Hassium N/A
109 Mt - Meitnerium N/A
110 Ds - Darmstadtium N/A
111 Rg - Roentgenium N/A
112 Cn - Copernicium N/A
113 Nh - Nihonium N/A
114 Fl - Flerovium N/A
115 Mc - Moscovium N/A
116 Lv - Livermorium N/A
117 Ts - Tennessine N/A
118 Og - Oganesson N/A

Properties