Table of ionisation potentials in eV and Ångströms

Values are from the CHIANTI database, and are in eV. Show in Ångströms

ZElementIIIIIIIVVVIVIIVIIIIXX
1H13.60
2He24.5954.42
3Li5.3975.64122.45
4Be9.3218.21153.89217.72
5B8.3025.1537.93259.38340.23
6C11.2624.3847.8964.49392.09489.99
7N14.5329.6047.4577.4797.89552.07667.05
8O13.6235.1254.9477.41113.90138.12739.33871.41
9F17.4234.9762.7187.14114.24157.16185.19953.911103.12
10Ne21.5640.9663.4697.12126.22157.93207.28239.101195.821362.20
11Na5.1447.2971.6298.91138.40172.18208.50264.25299.861465.12
12Mg7.6515.0480.14109.27141.27186.76225.02265.96327.90367.50
13Al5.9918.8328.45119.99153.83190.48241.76284.66330.13398.75
14Si8.1516.3533.4945.14166.77205.27246.48303.54351.12401.37
15P10.4919.7730.2051.4465.03220.42263.57309.60372.13424.42
16S10.3623.3434.7947.2272.5988.05280.95328.74379.55447.46
17Cl12.9723.8139.6153.4767.8297.03114.20348.28400.80455.63
18Ar15.7627.6340.7459.8175.0291.01124.32143.46422.45478.69
19K4.3431.6345.8160.9182.6699.44117.56154.88175.82503.75
20Ca6.1111.8750.9167.2784.51108.78127.21147.24188.54211.27
21Sc6.5612.8024.7673.4991.69110.68137.99158.08180.03225.18
22Ti6.8213.5827.4943.2799.30119.53140.85170.35192.05215.92
23V6.7414.6529.3146.7165.28128.13150.64173.45205.81230.49
24Cr6.7716.4930.9649.1669.4690.63160.18184.74209.29244.37
25Mn7.4315.6433.6751.2172.4195.60119.20194.53221.81248.34
26Fe7.9016.1930.6554.8075.0199.06124.98151.06233.59262.10
27Co7.8617.0833.5051.2779.47102.04128.94157.83186.14275.37
28Ni7.6418.1735.1954.9276.06107.87132.66162.42193.42224.66
29Cu7.7320.2936.8457.3879.85103.03138.86166.01198.99231.97
30Zn9.3917.9639.7259.5781.83107.99134.03173.95202.96238.05

Data from CHIANTI.