Ionization Energies

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Ionization Energies Navigation

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Krypton to Molybdenum

Element

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Krypton

I (1)

13.999605 ± 0.000002 eV

II (2)

24.35984 ± 0.00012 eV

III (3)

36.950 ± 0.012 eV

IV (4)

52.49 ± 0.20 eV

V (5)

64.69 ± 0.20 eV

VI (6)

78.49 ± 0.20 eV

VII (7)

111.0 ± 0.4 eV

VIII (8)

125.802 ± 0.003 eV

IX (9)

231.5 ± 2.5 eV

X (10)

268.2 ± 3 eV

XI (11)

308.2 ± 3 eV

XII (12)

350.1 ± 3 eV

XIII (13)

390.9 ± 4 eV

XIV (14)

446.6 ± 4 eV

XV (15)

491.8 ± 5 eV

XVI (16)

540.7 ± 5 eV

XVII (17)

591.5 ± 6 eV

XVIII (18)

640.9 ± 6 eV

XIX (19)

785.3 ± 2.6 eV

XX (20)

831.6 ± 0.9 eV

XXI (21)

882.8 ± 1.3 eV

XXII (22)

945.4 ± 3.3 eV

XXIII (23)

999.0 ± 2.4 eV

XXIV (24)

1042. ± 5. eV

XXV (25)

1155.0 ± 1.6 eV

XXVI (26)

1205.23 ± 0.04 eV

XXVII (27)

2928.9 ± 1.7 eV

XXVIII (28)

3072. ± 5. eV

XXIX (29)

3228. ± 7. eV

XXX (30)

3381 ± 26 eV

XXXI (31)

3584. ± 4. eV

XXXII (32)

3752. ± 2. eV

XXXIII (33)

3971. ± 4. eV

XXXIV (34)

4108.54 ± 0.10 eV

XXXV (35)

17296.56 ± 0.22 eV

XXXVI (36)

17936.208 ± 0.011 eV

Lanthanum

I (1)

5.5769 eV

II (2)

11.059 eV

III (3)

19.1774 ± 0.0006 eV

IV (4)

49.95 ± 0.06 eV

V (5)

61.6 ± 0.6 eV

Lead

I (1)

7.41663 eV

II (2)

15.03248 eV

III (3)

31.9373 eV

IV (4)

42.32 eV

V (5)

68.8 eV

Lutetium

I (1)

5.42586 eV

II (2)

13.9 eV

III (3)

20.9596 ± 0.0012 eV

IV (4)

45.25 ± 0.03 eV

V (5)

66.8 ± 0.3 eV

Magnesium

I (1)

7.646235 eV

II (2)

15.03527 eV

III (3)

80.1437 ± 0.0006 eV

IV (4)

109.2655 ± 0.0012 eV

V (5)

141.27 eV

VI (6)

186.76 eV

VII (7)

225.02 eV

VIII (8)

265.96 eV

IX (9)

328.06 eV

X (10)

367.50 eV

XI (11)

1761.805 ± 0.025 eV

XII (12)

1962.6650 ± 0.0006 eV

Manganese

I (1)

7.43402 eV

II (2)

15.6400 eV

III (3)

33.668 ± 0.010 eV

IV (4)

51.2 ± 0.1 eV

V (5)

72.4 ± 0.1 eV

VI (6)

95.60 ± 0.02 eV

VII (7)

119.204 ± 0.010 eV

VIII (8)

194.5 ± 0.4 eV

IX (9)

221.8 ± 0.5 eV

X (10)

248.3 ± 0.5 eV

XI (11)

286.0 ± 0.6 eV

XII (12)

314.4 ± 0.6 eV

XIII (13)

343.6 ± 0.7 eV

XIV (14)

403.0 ± 0.2 eV

XV (15)

435.166 ± 0.030 eV

XVI (16)

1134.7 ± 0.6 eV

XVII (17)

1224 ± 2.5 eV

XVIII (18)

1317 ± 3 eV

XIX (19)

1437 ± 3 eV

XX (20)

1539 ± 3 eV

XXI (21)

1644 ± 3 eV

XXII (22)

1788 ± 4 eV

XXIII (23)

1879.9 ± 0.4 eV

XXIV (24)

8140.7 ± 2.0 eV

XXV (25)

8572.01 ± 0.04 eV

Molybdenum

I (1)

7.09243 eV

II (2)

16.16 eV

III (3)

27.13 ± 0.12 eV

IV (4)

46.4 ± 0.2 eV

V (5)

54.49 ± 0.02 eV

VI (6)

68.8276 ± 0.0002 eV

VII (7)

125.66 ± 0.02 eV

VIII (8)

143.56 ± 1.00 eV

IX (9)

164.12 ± 0.09 eV

X (10)

186.4 ± 1.2 eV

XI (11)

209.3 ± 1.2 eV

XII (12)

230.28 ± 0.06 eV

XIII (13)

279.1 ± 0.5 eV

XIV (14)

302.60 ± 0.04 eV

XV (15)

544.0 ± 0.5 eV

XVI (16)

570 ± 22 eV

XVII (17)

636 ± 60 eV

XVIII (18)

702 ± 69 eV

XIX (19)

767 ± 30 eV

XX (20)

833 ± 33 eV

XXI (21)

902 ± 36 eV

XXII (22)

968 ± 38 eV

XXIII (23)

1020 ± 10 eV

XXIV (24)

1082 ± 11 eV

XXV (25)

1263 ± 12 eV

XXVI (26)

1323 ± 12 eV

XXVII (27)

1387 ± 14 eV

XXVIII (28)

1449 ± 14 eV

XXIX (29)

1535 ± 16 eV

XXX (30)

1601 ± 16 eV

XXXI (31)

1726 ± 17 eV

XXXII (32)

1791.3 ± 0.6 eV

XXXIII (33)

4257 ± 42 eV

XXXIV (34)

4430 ± 43 eV

XXXV (35)

4617 ± 46 eV

XXXVI (36)

4798 ± 48 eV

XXXVII (37)

5099 ± 51 eV

XXXVIII (38)

5296 ± 53 eV

XXXIX (39)

5546 ± 55 eV

XL (40)

5711.36 ± 0.62 eV

XLI (41)

23791.67 ± 0.10 eV

XLII (42)

24572.22 ± 0.02 eV

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

Kaufman, V., and W. C. Martin. "Wavelengths and Energy Level Classifications of Magnesium Spectra for All Stages of Ionization (Mg I through Mg XII)." Journal of Physical and Chemical Reference Data, volume 20, number 1, 1991, pp. 83–152.

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.

Podobedova, L. I., D. E. Kelleher, J. Reader, and W. L. Wiese. "Atomic Spectral Tables for the Chandra X-Ray Observatory. Part III. Mg V–Mg X." Journal of Physical and Chemical Reference Data, volume 33, number 2, 2004, pp. 495–524. doi:10.1063/1.1637923

Saloman, E. B. "Energy Levels and Observed Spectral Lines of Krypton, Kr I through Kr XXXVI." Journal of Physical and Chemical Reference Data, volume 36, number 1, 2007, pp. 215–386. doi:10.1063/1.2227036

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, Toshiaki Nakagaki, Kiyohiko Okazaki, Jack Sugar, and Wolfgang L. Wiese. "Spectral Data and Grotrian Diagrams for Highly Ionized Manganese, Mn VII through Mn XXV." Journal of Physical and Chemical Reference Data, volume 23, number 2, 1994, pp. 179–294.

Sugar, Jack, and Arlene Musgrove. "Energy Levels of Molybdenum, Mo I through Mo XLII." Journal of Physical and Chemical Reference Data, volume 17, number 1, 1988, pp. 155–239.

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.

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