lonization potentials 4.1.2



	You are here:		Chapter: 4 Atomic and nuclear physics Section: 4.1 Electrons in atoms SubSection: 4.1.2 Ionization potentials

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4.1.2 lonization potentials

The ionization potential is the least energy, expressed in electron volts, which is necessary to remove an electron from a free unexcited neutral atom (or additional electron from an ionized atom). It can be determined either directly from the speed of the slowest electrons which will ionize the atom by collision, or more accurately from the limit of a spectroscopic series.

Ionization potentials (eV)


H	13.598	Ne	21.56	K	4.34	Ni⁺	18.15	Tc	7.28	Ba⁺	10.00
He	24.587	Ne⁺	41.08	K⁺	31.71	Ni²⁺	35.20	Ru	7.36	La	5.61
He⁺	54.42	Ne²⁺	63.45	Ca	6.11	Cu	7.72	Rh	7.46	Ta	7.88
Li	5.39	Na	5.14	Ca⁺	11.87	Zn	9.39	Pd	8.33	W	7.98
Li⁺	75.60	Na⁺	47.30	Sc	6.54	Ga	6.00	Ag	7.57	Re	7.87
Be	9.32	Mg	7.65	Ti	6.82	Ge	7.88	Cd	8.99	Os	8.70
B	8.30	Mg⁺	15.04	V	6.74	As	9.81	In	5.79	Pt	9.00
C	11.26	Al	5.99	Cr	6.77	Se	9.75	Sn	7.34	Au	9.22
C⁺	24.38	Al⁺	18.83	Mn	7.43	Br	10.56	Sb	8.64	Hg	10.43
C²⁺	47.88	Si	8.15	Fe	7.87	Kr	14.00	Te	9.01	Tl	6.11
N	14.53	P	10.49	Fe⁺	16.18	Rb	4.18	I	10.45	Pb	7.42
N⁺	29.60	S	10.36	Fe²⁺	30.65	Sr	5.69	Xe	12.13	Ra	5.28
N²⁺	47.44	S⁺	23.41	Co	7.86	Y	6.25	Xe⁺	23.39	Th	7.50
O	13.62	Cl	12.97	Co⁺	17.06	Zr	6.95	Cs	3.89	U	6.19
O⁺	35.12	A	15.75	Co²⁺	33.50	Nb	6.77	Cs⁺	25.10	Np	6.16
O²⁺	54.90	A⁺	27.63	Ni	7.64	Mo	7.06	Ba	5.21	Pu	5.71
F	17.42

References

W. Lotz (1967), J. Opt. Soc. Am., 57, 873.
Handbook of Physics, 1967, 2nd edn.
J. Chem. Phys., 1969, 51, 3105.

J.C. Rivière/M.P. Seah

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