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ionization potential
subjectfact 
ionization potentialhas definition The minimum energy required to remove an electron from an atom. It always takes a higher energy to remove a second electron from a singly ionized atom, a still higher energy to remove a third, etc. The ionization potential for hydrogen is 13.596 eV, which corresponds to a wavelength of 912 Å.has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:33:13.0
is a kind of energy2001-09-27 09:33:13.0
energyhas unit energy unit2001-09-27 09:33:13.0
numberhas value2001-09-27 09:32:57.0