Ionization energy of Periodic Table Elements

Periodic Table elements

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List of Periodic Table elements - Ionization energy
No.	*	Atomic weight	Name	Sym.	M.P. (°C)	B.P. (°C)	Group*	Ionization energy (eV)
1		1.008	Hydrogen	H	-259	-253	1	13.60
2		4.002	Helium	He	-272	-269	18	24.59
3		6.940	Lithium	Li	180	1,347	1	5.39
4		9.012	Beryllium	Be	1,278	2,970	2	9.32
5		10.810	Boron	B	2,300	2,550	13	8.30
6		12.011	Carbon	C	3,500	4,827	14	11.26
7		14.007	Nitrogen	N	-210	-196	15	14.53
8		15.999	Oxygen	O	-218	-183	16	13.62
9		18.998	Fluorine	F	-220	-188	17	17.42
10		20.180	Neon	Ne	-249	-246	18	21.57
11		22.989	Sodium	Na	98	883	1	5.14
12		24.305	Magnesium	Mg	639	1,090	2	7.65
13		26.981	Aluminum	Al	660	2,467	13	5.99
14		28.085	Silicon	Si	1,410	2,355	14	8.15
15		30.973	Phosphorus	P	44	280	15	10.49
16		32.060	Sulfur	S	113	445	16	10.36
17		35.450	Chlorine	Cl	-101	-35	17	12.97
18		39.950	Argon	Ar	-189	-186	18	15.76
19		39.098	Potassium	K	64	774	1	4.34
20		40.078	Calcium	Ca	839	1,484	2	6.11
21		44.955	Scandium	Sc	1,539	2,832	3	6.56
22		47.867	Titanium	Ti	1,660	3,287	4	6.83
23		50.942	Vanadium	V	1,890	3,380	5	6.75
24		51.996	Chromium	Cr	1,857	2,672	6	6.77
25		54.938	Manganese	Mn	1,245	1,962	7	7.43
26		55.845	Iron	Fe	1,535	2,750	8	7.90
27		58.933	Cobalt	Co	1,495	2,870	9	7.88
28		58.693	Nickel	Ni	1,453	2,732	10	7.64
29		63.546	Copper	Cu	1,083	2,567	11	7.73
30		65.380	Zinc	Zn	420	907	12	9.39
31		69.723	Gallium	Ga	30	2,403	13	6.00
32		72.630	Germanium	Ge	937	2,830	14	7.90
33		74.921	Arsenic	As	81	613	15	9.82
34		78.971	Selenium	Se	217	685	16	9.75
35		79.904	Bromine	Br	-7	59	17	11.81
36		83.798	Krypton	Kr	-157	-153	18	14.00
37		85.468	Rubidium	Rb	39	688	1	4.18
38		87.620	Strontium	Sr	769	1,384	2	5.70
39		88.905	Yttrium	Y	1,523	3,337	3	6.22
40		91.224	Zirconium	Zr	1,852	4,377	4	6.63
41		92.906	Niobium	Nb	2,468	4,927	5	6.76
42		95.950	Molybdenum	Mo	2,617	4,612	6	7.09
43	*	97.000	Technetium	Tc	2,200	4,877	7	7.28
44		101.070	Ruthenium	Ru	2,250	3,900	8	7.36
45		102.905	Rhodium	Rh	1,966	3,727	9	7.46
46		106.420	Palladium	Pd	1,552	2,927	10	8.34
47		107.868	Silver	Ag	962	2,212	11	7.58
48		112.414	Cadmium	Cd	321	765	12	8.99
49		114.818	Indium	In	157	2,000	13	5.79
50		118.710	Tin	Sn	232	2,270	14	7.34
51		121.760	Antimony	Sb	630	1,750	15	8.64
52		127.600	Tellurium	Te	449	990	16	9.01
53		126.904	Iodine	I	114	184	17	10.45
54		131.293	Xenon	Xe	-112	-108	18	12.13
55		132.905	Cesium	Cs	29	678	1	3.89
56		137.327	Barium	Ba	725	1,140	2	5.21
57		138.905	Lanthanum	La	920	3,469	3	5.58
58		140.116	Cerium	Ce	795	3,257	101	5.54
59		140.907	Praseodymium	Pr	935	3,127	101	5.46
60		144.242	Neodymium	Nd	1,010	3,127	101	5.53
61	*	145.000	Promethium	Pm	1,100	3,000	101	5.55
62		150.360	Samarium	Sm	1,072	1,900	101	5.64
63		151.964	Europium	Eu	822	1,597	101	5.67
64		157.250	Gadolinium	Gd	1,311	3,233	101	6.15
65		158.925	Terbium	Tb	1,360	3,041	101	5.86
66		162.500	Dysprosium	Dy	1,412	2,562	101	5.94
67		164.930	Holmium	Ho	1,470	2,720	101	6.02
68		167.259	Erbium	Er	1,522	2,510	101	6.11
69		168.934	Thulium	Tm	1,545	1,727	101	6.18
70		173.045	Ytterbium	Yb	824	1,466	101	6.25
71		174.967	Lutetium	Lu	1,656	3,315	101	5.43
72		178.486	Hafnium	Hf	2,150	5,400	4	6.83
73		180.947	Tantalum	Ta	2,996	5,425	5	7.89
74		183.840	Tungsten	W	3,410	5,660	6	7.98
75		186.207	Rhenium	Re	3,180	5,627	7	7.88
76		190.230	Osmium	Os	3,045	5,027	8	8.70
77		192.217	Iridium	Ir	2,410	4,527	9	9.10
78		195.084	Platinum	Pt	1,772	3,827	10	9.00
79		196.966	Gold	Au	1,064	2,807	11	9.23
80		200.592	Mercury	Hg	-39	357	12	10.44
81		204.380	Thallium	Tl	303	1,457	13	6.11
82		207.200	Lead	Pb	327	1,740	14	7.42
83		208.980	Bismuth	Bi	271	1,560	15	7.29
84	*	209.000	Polonium	Po	254	962	16	8.42
85	*	210.000	Astatine	At	302	337	17	9.50
86	*	222.000	Radon	Rn	-71	-62	18	10.75
87	*	223.000	Francium	Fr	27	677	1	3.90
88	*	226.000	Radium	Ra	700	1,737	2	5.28
89	*	227.000	Actinium	Ac	1,050	3,200	3	5.17
90		232.038	Thorium	Th	1,750	4,790	102	6.08
91		231.035	Protactinium	Pa	1,568	0	102	5.89
92		238.028	Uranium	U	1,132	3,818	102	6.19
93	*	237.000	Neptunium	Np	640	3,902	102	6.27
94	*	244.000	Plutonium	Pu	640	3,235	102	6.06
95	*	243.000	Americium	Am	994	2,607	102	5.99
96	*	247.000	Curium	Cm	1,340	0	102	6.02
97	*	247.000	Berkelium	Bk	986	0	102	6.23
98	*	251.000	Californium	Cf	900	0	102	6.30
99	*	252.000	Einsteinium	Es	860	0	102	6.42
100	*	257.000	Fermium	Fm	1,527	0	102	6.50
101	*	258.000	Mendelevium	Md	0	0	102	6.58
102	*	259.000	Nobelium	No	827	0	102	6.65
103	*	262.000	Lawrencium	Lr	1,627	0	102	0.00
104	*	267.000	Rutherfordium	Rf	0	0	4	0.00
105	*	270.000	Dubnium	Db	0	0	5	0.00
106	*	269.000	Seaborgium	Sg	0	0	6	0.00
107	*	270.000	Bohrium	Bh	0	0	7	0.00
108	*	0.000	Hassium	Hs	0	0	8	0.00
109	*	0.000	Meitnerium	Mt	0	0	9	0.00
110		0.000		Ds	0	0		0.00
111		0.000		Rg	0	0		0.00
112		0.000		Cn	0	0		0.00
113		0.000		Nh	0	0		0.00
114		0.000		Fl	0	0		0.00
115		0.000		Mc	0	0		0.00
116		0.000		Lv	0	0		0.00
117		0.000		Ts	0	0		0.00
118		0.000		Og	0	0		0.00
No.		A. weight	Name	Sym.	M.P. (°C)	B.P. (°C)	Group*	Ionization energy (eV)

Abbreviations and definitions:

No. - Atomic Number; A. weight - Atomic weight; M.P. - Melting point; B.P. - Boiling point

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Footnotes:

Group: There are only 18 groups in the periodic table that constitute the columns of the table. Lanthanoids and Actinoids are numbered as 101 and 102 to separate them in sorting by group.
The elements marked with an asterisk (in the 2nd column) have no stable nuclides. For these elements, the weight value shown represents the mass number of the longest-lived isotope of the element.
For the Year of Discovery of each elements see the list with the English and Hebrew names.

Abbreviations and Definitions:

No. - Atomic Number; M.P. - melting point; B.P. - boiling point

Atomic number: The number of protons in an atom. Each element is uniquely defined by its atomic number.

Atomic mass: The mass of an atom is primarily determined by the number of protons and neutrons in its nucleus. Atomic mass is measured in Atomic Mass Units (amu), which are scaled relative to carbon, ¹²C, that is taken as a standard element with an atomic mass of 12. This isotope of carbon has 6 protons and 6 neutrons. Thus, each proton and neutron has a mass of about 1 amu.

Isotope: Atoms of the same element with the same atomic number, but a different number of neutrons. The isotope of an element is defined by the sum of the number of protons and neutrons in its nucleus. Elements have more than one isotope with varying numbers of neutrons. For example, the two common isotopes of carbon, ¹²C and ¹³C, have 6 and 7 neutrons, respectively. The abundance of each isotope depends on the source of materials. For relative abundances of isotopes in nature, see reference on Atomic Weights and Isotopic Compositions.

Atomic weight: Atomic weight values represent weighted average of the masses of all naturally occurring isotopes of an element. The values shown here are based on the IUPAC Commission determinations (Pure Appl. Chem. 73:667-683, 2001). The elements marked with an asterisk have no stable nuclides. For these elements, the weight value represents the mass number of the longest-lived isotope of the element.

Electron configuration: See next page for explanation of electron configuration of atoms.

Ionization energy (IE): The energy required to remove the outermost electron from an atom or a positive ion in its ground level. The table lists only the first IE in eV units. To convert to kJ/mol, multiply by 96.4869. Reference: NIST Reference Table on Ground states and ionization energies for the neutral atoms. IE decreases going down a column of the periodic table, and increases from left to right in a row. Thus, alkali metals have the lowest IE in a period and, Rare gases have the highest.

Other resources related to the Periodic Table

Citation for the page

Israel Chemistry Directory. (2024, November 15). "Sortable list of elements of the Periodic Table". Retrieved from https://www.science.co.il/elements/