Ionization Potentials of atoms

table without lines
  Z   Sym   Name         I[eV]   core Configuration    
1   H   Hydrogen 13,60     (1s)      
2   He   Helium 24,59     (1s)2      
3   Li   Lithium 5,39   [He] (2s)      
4   Be   Beryllium 9,32   [He] (2s)2      
5   B   Boron 8,30   [He] (2s)2 (2p)    
6   C   Carbon 11,26   [He] (2s)2 (2p)2    
7   N   Nitrogen 14,53   [He] (2s)2 (2p)3    
8   O   Oxygen 13,62   [He] (2s)2 (2p)4    
9   F   Fluorine 17,42   [He] (2s)2 (2p)5    
10   Ne   Neon 21,56   [He] (2s)2 (2p)6    
11   Na   Sodium 5,14   [Ne] (3s)      
12   Mg   Magnesium 7,65   [Ne] (3s)2      
13   Al   Aluminum 5,99   [Ne] (3s)2 (3p)    
14   Si   Silicon 8,15   [Ne] (3s)2 (3p)2    
15   P   Phosphorus 10,49   [Ne] (3s)2 (3p)3    
16   S   Sulfur 10,36   [Ne] (3s)2 (3p)4    
17   Cl   Chlorine 12,97   [Ne] (3s)2 (3p)5    
18   Ar   Argon 15,76   [Ne] (3s)2 (3p)6    
19   K   Potassium 4,34   [Ar] (4s)      
20   Ca   Calcium 6,11   [Ar] (4s)2      
21   Sc   Scandium 6,54   [Ar] (3d) (4s)2    
22   Ti   Titanium 6,82   [Ar] (3d)2 (4s)2    
23   V   Vanadium 6,74   [Ar] (3d)3 (4s)2    
24   Cr   Chromium 6,77   [Ar] (3d)5 (4s)    
25   Mn   Manganese 7,44   [Ar] (3d)5 (4s)2    
26   Fe   Iron 7,87   [Ar] (3d)6 (4s)2    
27   Co   Cobalt 7,86   [Ar] (3d)7 (4s)2    
28   Ni   Nickel 7,64   [Ar] (3d)8 (4s)2    
29   Cu   Copper 7,73   [Ar] (3d)10 (4s)    
30   Zn   Zinc 9,39   [Ar] (3d)10 (4s)2    
31   Ga   Gallium 6,00   [Ar] (3d)10 (4s)2 (4p)  
32   Ge   Germanium 7,90   [Ar] (3d)10 (4s)2 (4p)2  
33   As   Arsenic 9,81   [Ar] (3d)10 (4s)2 (4p)3  
34   Se   Selenium 9,75   [Ar] (3d)10 (4s)2 (4p)4  
35   Br   Bromine 11,81   [Ar] (3d)10 (4s)2 (4p)5  
36   Kr   Krypton 14,00   [Ar] (3d)10 (4s)2 (4p)6  
37   Rb   Rubidium 4,18   [Kr] (5s)      
38   Sr   Strontium 5,70   [Kr] (5s)2      
39   Y   Yttrium 6,38   [Kr] (4d) (5s)2    
40   Zr   Zirconium 6,84   [Kr] (4d)2 (5s)2    
41   Nb   Niobium 6,88   [Kr] (4d)4 (5s)    
42   Mo   Molybdenum 7,10   [Kr] (4d)5 (5s)    
43   Tc   Technetium 7,28   [Kr] (4d)5 (5s)2    
44   Ru   Ruthenium 7,37   [Kr] (4d)7 (5s)    
45   Rh   Rhodium 7,46   [Kr] (4d)8 (5s)    
46   Pd   Palladium 8,34   [Kr] (4d)10      
47   Ag   Silver 7,58   [Kr] (4d)10 (5s)    
48   Cd   Cadmium 8,99   [Kr] (4d)10 (5s)2    
49   In   Indium 5,79   [Kr] (4d)10 (5s)2 (5p)  
50   Sn   Tin 7,34   [Kr] (4d)10 (5s)2 (5p)2  
51   Sb   Antimony 8,64   [Kr] (4d)10 (5s)2 (5p)3  
52   Te   Tellurium 9,01   [Kr] (4d)10 (5s)2 (5p)4  
53   I   Iodine 10,45   [Kr] (4d)10 (5s)2 (5p)5  
54   Xe   Xenon 12,13   [Kr] (4d)10 (5s)2 (5p)6  
55   Cs   Cesium 3,89   [Xe] (6s)      
56   Ba   Barium 5,21   [Xe] (6s)2      
57   La   Lanthanum 5,58   [Xe] (5d) (6s)2    
58   Ce   Cerium 5,54   [Xe] (4f) (5d) (6s)2  
59   Pr   Praseodymium 5,46   [Xe] (4f)3 (6s)2    
60   Nd   Neodymium 5,53   [Xe] (4f)4 (6s)2    
61   Pm   Promethium 5,55   [Xe] (4f)5 (6s)2    
62   Sm   Samarium 5,64   [Xe] (4f)6 (6s)2    
63   Eu   Europium 5,67   [Xe] (4f)7 (6s)2    
64   Gd   Gadolinium 6,15   [Xe] (4f)7 (5d) (6s)2  
65   Tb   Terbium 5,86   [Xe] (4f)9 (6s)2    
66   Dy   Dysprosium 5,94   [Xe] (4f)10 (6s)2    
67   Ho   Holmium 6,02   [Xe] (4f)11 (6s)2    
68   Er   Erbium 6,10   [Xe] (4f)12 (6s)2    
69   Tm   Thulium 6,18   [Xe] (4f)13 (6s)2    
70   Yb   Ytterbium 6,25   [Xe] (4f)14 (6s)2    
71   Lu   Lutetium 5,43   [Xe] (4f)14 (5d) (6s)2  
72   Hf   Hafnium 6,65   [Xe] (4f)14 (5d)2 (6s)2  
73   Ta   Tantalum 7,89   [Xe] (4f)14 (5d)3 (6s)2  
74   W   Tungsten 7,98   [Xe] (4f)14 (5d)4 (6s)2  
75   Re   Rhenium 7,88   [Xe] (5f)14 (5d)5 (6s)2  
76   Os   Osmium 8,70   [Xe] (4f)14 (5d)6 (6s)2  
77   Ir   Iridium 9,10   [Xe] (4f)14 (5d)7 (6s)2  
78   Pt   Platinum 9,00   [Xe] (4f)14 (5d)9 (6s)  
79   Au   Gold 9,23   [Xe] (4f)14 (5d)10 (6s)  
80   Hg   Mercury 10,44   [Xe] (4f)14 (5d)10 (6s)2  
81   Tl   Thallium 6,11   [Xe] (4f)14 (5d)10 (6s)2 (6p)
82   Pb   Lead 7,42   [Xe] (4f)14 (5d)10 (6s)2 (6p)2
83   Bi   Bismuth 7,29   [Xe] (4f)14 (5d)10 (6s)2 (6p)3
84   Po   Polonium 8,42   [Xe] (4f)14 (5d)10 (6s)2 (6p)4
85   At   Astatine 9,65   [Xe] (4f)14 (5d)10 (6s)2 (6p)5
86   Rn   Radon 10,75   [Xe] (4f)14 (5d)10 (6s)2 (6p)6
87   Fr   Francium 3,83   [Rn] (7s)      
88   Ra   Radium 5,28   [Rn] (7s)2      
89   Ac   Actinium 5,17   [Rn] (6d) (7s)2    
90   Th   Thorium 6,08   [Rn] (6d)2 (7s)2    
91   Pa   Protactinium 5,89   [Rn] (5f)2 (6d) (7s)2  
92   U   Uranium 6,05   [Rn] (5f)3 (6d) (7s)2  
93   Np   Neptunium 6,19   [Rn] (5f)4 (6d) (7s)2  
94   Pu   Plutonium 6,06   [Rn] (5f)6 (7s)2    
95   Am   Americium 5,99   [Rn] (5f)7 (7s)2    
96   Cm   Curium 6,02   [Rn] (5f)7 (6d) (7s)2  
97   Bk   Berkelium 6,23   [Rn] (5f)8 (6d) (7s)2  
98   Cf   Californium 6,30   [Rn] (5f)10 (7s)2    
99   Es   Einsteinium 6,42   [Rn] (5f)11 (7s)2    
100   Fm   Fermium 6,50   [Rn] (5f)12 (7s)2    
101   Md   Mendelevium 6,58   [Rn] (5f)13 (7s)2    
102   No   Nobelium 6,65   [Rn] (5f)14 (7s)2    
103   Lr   Lawrencium 4,87   [Rn] (5f)14 (6d) (7s)2  
104   Rf   rutherfordium 6,01