1st Ionization Energy vs Atomic Number

380 kJ/mol
2377 kJ/mol
ElementAtomic Number1st Ionization Energy (kJ/mol)
Hydrogen11312
Helium22377
Lithium3520
Beryllium4899
Boron5801
Carbon61086
Nitrogen71420
Oxygen81314
Fluorine91681
Neon102088
Sodium11495
Magnesium12735
Aluminium13580
Silicon14780
Phosphorus151060
Sulfur161005
Chlorine171255
Argon181527
Potassium19419
Calcium20590
Scandium21633
Titanium22659
Vanadium23651
Chromium24653
Manganese25717
Iron26763
Cobalt27761
Nickel28737
Copper29746
Zinc30906
Gallium31579
Germanium32762
Arsenic33947
Selenium34941
Bromine351140
Krypton361356
Rubidium37409
Strontium38550
Yttrium39600
Zirconium40640
Niobium41652
Molybdenum42684
Technetium43702
Ruthenium44710
Rhodium45720
Palladium46804
Silver47731
Cadmium48868
Indium49558
Tin50709
Antimony51834
Tellurium52869
Iodine531008
Xenon541176
Cesium55382
Barium56508
Lanthanum57538
Cerium58534
Praseodymium59527
Neodymium60533
Promethium61540
Samarium62545
Europium63547
Gadolinium64593
Terbium65566
Dysprosium66573
Holmium67581
Erbium68589
Thulium69597
Ytterbium70603
Lutetium71524
Hafnium72659
Tantalum73761
Tungsten74770
Rhenium75760
Osmium76840
Iridium77880
Platinum78870
Gold79890
Mercury801007
Thallium81589
Lead82723
Bismuth83711
Polonium84821
Astatine85920
Radon861042
Francium87380
Radium88509
Actinium89499
Thorium90587
Protactinium91568
Uranium92598
Neptunium93605
Plutonium94585
Americium95578
Curium96581
Berkelium97601
Californium98608
Einsteinium99619
Fermium100627
Mendelevium101635
Nobelium102642
Lawrencium103N/A
Rutherfordium104N/A
Dubnium105N/A
Seaborgium106N/A
Bohrium107N/A
Hassium108N/A
Meitnerium109N/A
Darmstadtium110N/A
Roentgenium111N/A
Copernicium112N/A
Nihonium113N/A
Flerovium114N/A
Moscovium115N/A
Livermorium116N/A
Tennessine117N/A
Oganesson118N/A