Ionization Energies

Numerari from KnowledgeDoor---The scientific calculator with graphing, unit keypads, complex numbers, constants, advanced functions, user-defined keys, quick copy, and more!

Ionization Energies Navigation

By Name

By Symbol

By Number

Calcium to Dubnium

Element

Click button to see citations

Calcium

I (1)

6.11316 eV

II (2)

11.87172 eV

III (3)

50.9135 ± 0.0002 eV

IV (4)

67.27 ± 0.13 eV

V (5)

84.50 ± 0.17 eV

VI (6)

108.78 ± 0.20 eV

VII (7)

127.2 ± 0.2 eV

VIII (8)

147.24 ± 0.12 eV

IX (9)

188.54 ± 0.02 eV

X (10)

211.277 ± 0.006 eV

XI (11)

591.9 ± 0.4 eV

XII (12)

657.2 ± 1.3 eV

XIII (13)

726.6 ± 1.4 eV

XIV (14)

817.6 ± 1.6 eV

XV (15)

894.5 ± 1.8 eV

XVI (16)

974 ± 2 eV

XVII (17)

1087 ± 2 eV

XVIII (18)

1157.8 ± 0.2 eV

XIX (19)

5128.8 ± 1.0 eV

XX (20)

5469.906 ± 0.013 eV

Carbon

I (1)

11.26030 eV

II (2)

24.3833 eV

III (3)

47.8878 eV

IV (4)

64.4939 eV

V (5)

392.087 eV

VI (6)

489.99334 eV

Cerium

I (1)

5.5387 eV

II (2)

10.85 eV

III (3)

20.198 ± 0.003 eV

IV (4)

36.758 ± 0.005 eV

V (5)

65.55 ± 0.25 eV

VI (6)

77.6 ± 1.2 eV

Chlorine

I (1)

12.96763 eV

II (2)

23.8136 eV

III (3)

39.61 eV

IV (4)

53.4652 eV

V (5)

67.8 eV

VI (6)

97.03 eV

VII (7)

114.1958 eV

VIII (8)

348.28 eV

IX (9)

400.06 eV

X (10)

455.63 eV

XI (11)

529.28 eV

XII (12)

591.99 eV

XIII (13)

656.71 eV

XIV (14)

749.76 eV

XV (15)

809.40 eV

XVI (16)

3658.521 eV

XVII (17)

3946.2960 eV

Chromium

I (1)

6.76651 eV

II (2)

16.4857 eV

III (3)

30.96 ± 0.02 eV

IV (4)

49.16 ± 0.05 eV

V (5)

69.46 eV

VI (6)

90.6356 eV

VII (7)

160.18 eV

VIII (8)

184.7 eV

IX (9)

209.3 eV

X (10)

244.4 eV

XI (11)

270.8 eV

XII (12)

298.0 eV

XIII (13)

354.8 eV

XIV (14)

384.171 eV

XV (15)

1010.6 eV

XVI (16)

1097 eV

XVII (17)

1185 eV

XVIII (18)

1299 ± 3 eV

XIX (19)

1396 eV

XX (20)

1496 eV

XXI (21)

1643 eV

XXII (22)

1721.4 eV

XXIII (23)

7481.4 eV

XXIV (24)

7894.87 eV

Cobalt

I (1)

7.88101 eV

II (2)

17.084 eV

III (3)

33.50 ± 0.06 eV

IV (4)

51.3 ± 0.1 eV

V (5)

79.5 ± 0.2 eV

VI (6)

102.0 ± 0.2 eV

VII (7)

128.9 ± 0.2 eV

VIII (8)

157.8 eV

IX (9)

186.13 eV

X (10)

275.4 eV

XI (11)

305 eV

XII (12)

336 eV

XIII (13)

379 eV

XIV (14)

411 eV

XV (15)

444 eV

XVI (16)

511.96 eV

XVII (17)

546.58 eV

XVIII (18)

1397.2 eV

XIX (19)

1504.6 eV

XX (20)

1603 eV

XXI (21)

1735 eV

XXII (22)

1846 eV

XXIII (23)

1962 eV

XXIV (24)

2119 eV

XXV (25)

2219.0 eV

XXVI (26)

9544.1 eV

XXVII (27)

10012.0 eV

Copper

I (1)

7.72638 eV

II (2)

20.2924 eV

III (3)

36.841 ± 0.012 eV

IV (4)

57.38 ± 0.05 eV

V (5)

79.8 ± 0.7 eV

VI (6)

103 ± 1 eV

VII (7)

139 ± 1 eV

VIII (8)

166 ± 2 eV

IX (9)

199 ± 2 eV

X (10)

232 eV

XI (11)

265.3 eV

XII (12)

368.8 eV

XIII (13)

401 eV

XIV (14)

435 eV

XV (15)

484 eV

XVI (16)

520 eV

XVII (17)

557 eV

XVIII (18)

633 eV

XIX (19)

670.588 eV

XX (20)

1689.6 eV

XXI (21)

1804 eV

XXII (22)

1916 eV

XXIII (23)

2060 eV

XXIV (24)

2182 eV

XXV (25)

2308 eV

XXVI (26)

2478 eV

XXVII (27)

2587.5 eV

XXVIII (28)

11062.378 eV

XXIX (29)

11567.617 eV

References (Click the next to a value above to see complete citation information for that entry)

Lide, David R., editor. CRC Handbook of Chemistry and Physics, 88th edition. Boca Raton, Florida: Taylor & Francis Group, 2008.

Martin, W. C., Romuald Zalubas, and Lucy Hagan. Atomic Energy Levels—The Rare-Earth Elements. Washington, D.C.: National Bureau of Standards, 1978.

Moore, Charlotte E. Ionization Potentials and Ionization Limits Derived from the Analyses of Optical Spectra. Washington, D.C.: National Bureau of Standards, 1970.

Sansonetti, J. E., and W. C. Martin. "Handbook of Basic Atomic Spectroscopic Data." Journal Of Physical And Chemical Reference Data, volume 34, number 4, 2005, pp. 1559–2259. doi:10.1063/1.1800011

Seaborg, Glenn T., and Walter D. Loveland. The Elements Beyond Uranium. New York: John Wiley & Sons, Inc., 1990.

Shirai, Toshizo, Alberto Mengoni, Yohta Nakai, Jack Sugar, Wolfgang L. Wiese, Kazuo Mori, and H. Sakai. "Spectral Data and Grotrian Diagrams for Highly Ionized Cobalt, Co VIII through Co XXVII." Journal of Physical and Chemical Reference Data, volume 21, number 1, 1992, pp. 23–121.

Shirai, Toshizo, Toshiaki Nakagaki, Yohta Nakai, Jack Sugar, Keishi Ishii, and Kazuo Mori. "Spectral Data and Grotrian Diagrams for Highly Ionized Copper, Cu X–Cu XXIX." Journal of Physical and Chemical Reference Data, volume 20, number 1, 1991, pp. 1–81.

Shirai, Toshizo, Yohta Nakai, Toshiaki Nakagaki, Jack Sugar, and Wolfgang L. Wiese. "Spectral Data and Grotrian Diagrams for Highly Ionized Chromium, Cr V through Cr XXIV." Journal of Physical and Chemical Reference Data, volume 22, number 5, 1993, pp. 1279–1423.

Sugar, Jack, and Arlene Musgrove. "Energy Levels of Copper, Cu I through Cu XXIX." Journal of Physical and Chemical Reference Data, volume 19, number 3, 1990, pp. 527–616.

Sugar, Jack, and Charles Corliss. "Atomic Energy Levels of the Iron-Period Elements: Potassium through Nickel." Journal of Physical and Chemical Reference Data, volume 14, number 2, 1985, pp. 1–664.

Heaven's Boulevard astronomical sky image for any location, date, and time.
Personalize with a picture and message. Great gift for birthdays, anniversaries, or any special event.