Ionization energy: 4th
The 4th ionization energy of the element M is a measure of the energy required to remove one electron from one mole of the gaseous ion M3+





Units
kJ mol-1
Notes
None
For access to other ionisation enrgies, select from:
- Ionisation energy definition
 - 1st ionisation energies
 - 2nd ionisation energies
 - 3rd ionisation energies
 - 4th ionisation energies
 - 5th ionisation energies
 - 6th ionisation energies
 - 7th ionisation energies
 - 8th ionisation energies
 - 9th ionisation energies
 - 10th ionisation energies
 - 11th ionisation energies
 - 12th ionisation energies
 - 13th ionisation energies
 - 14th ionisation energies
 - 15th ionisation energies
 - 16th ionisation energies
 - 17th ionisation energies
 - 18th ionisation energies
 - 19th ionisation energies
 - 20th ionisation energies
 - 21st ionisation energies
 
Literature sources
- J.E. Huheey, E.A. Keiter, and R.L. Keiter in Inorganic Chemistry: Principles of Structure and Reactivity, 4th edition, HarperCollins, New York, USA, 1993.
 - D.R. Lide, (Ed.) in Chemical Rubber Company handbook of chemistry and physics, CRC Press, Boca Raton, Florida, USA, 79th edition, 1998.
 - J.A. Dean (ed) in Lange's Handbook of Chemistry, McGraw-Hill, New York, USA, 14th edition, 1992.
 - A. Kramida, Yu. Ralchenko, J. Reader, and NIST ASD Team (2018). NIST Atomic Spectra Database (ver. 5.5.6), [Online]. Available: https://physics.nist.gov/asd [Accessed 10 March 2018]. National Institute of Standards and Technology, Gaithersburg, MD.
 
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		* | 
			 71 
			
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			 87 
			
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		** | 
			 103 
			
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| *Lanthanoids | * | 
			 57 
			
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| **Actinoids | ** | 
			 89 
			
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