List of Atomic Elements

Introduction

List of Elements extracted from the IUAPAC Commission on Atomic Weights and Isotopic Abundances. (http://www.chem.qmul.ac.uk/iupac/). The atomic weights (called as well Atomic Mass) have been removed from the original table as they correspond to the average mass of the atoms of an element. This is a weighted average of the naturally-occurring isotopes and this is not relevant for astrophysical applications.

The quantities described in this table are:

• the atomic number Z, corresponding to the number of protons found in the nucleus of an atom. The atomic number uniquely identifies a chemical element.
• the symbol
• the name
• the isotopic masses for light atomic species
• nuclear spins for light atomic species

Isotopic atomic species

Note that isotopic atomic species of a given element is uniquely identified by the mass number A, also called atomic mass number, which is the number of nucleons (protons and neutrons) in an atomic nucleus. The full isotope symbol would also have the atomic number Z as a subscript to the left of the element symbol directly below the mass number: .

For the special case of Hydrogen, isotopic atomic species have specific symbols and names:

• 1 neutron and 1 proton: Symbol=’D’ and Name=’Deuterium’
• 2 neutrons and 1 proton: Symbol=’T’ and Name=’Tritium’

List of Elements in Atomic Number Order

The names and symbols for elements 112-118 are under review. The temporary system [IUPACAt] recommended by J Chatt, Pure Appl. Chem., 51, 381-384 (1979) is used above.

The names of elements 101-109 were agreed in 1997 (see Pure Appl. Chem., 69, 2471-2473, 1997), for element 110 in 2003 (see Pure Appl. Chem., 75, 1613-1615, 2003) and for element 111 in 2004 (see Pure Appl. Chem., 76, 2101-2103, 2004).

Atomic Number	Symbol	Name	Atomic Mass Number	Nuclear Spin
1	H	Hydrogen	1	0.5
	D	Deuterium	2	1
	T	Tritium	3	0.5
2	He	Helium	4	0
			3	0.5
3	Li	Lithium	7	1.5
			6	1
4	Be	Beryllium	9	1.5
5	B	Boron	11	1.5
			10	3
6	C	Carbon	12	0
			13	0.5
7	N	Nitrogen	14	1
			15	0.5
8	O	Oxygen	16	0
			17	2.5
			18	0
9	F	Fluorine	19	0.5
10	Ne	Neon	20	0
			21	1.5
			22	0
11	Na	Sodium	23	1.5
12	Mg	Magnesium	24	0
			25	2.5
			26	0
13	Al	Aluminium	27	2.5
14	Si	Silicon	28	0
			29	0.5
			30	0
15	P	Phosphorus	31	0.5
16	S	Sulfur	32	0
			33	1.5
			34	0
17	Cl	Chlorine	35	1.5
			37	1.5
18	Ar	Argon	40	0
			36	0
			38	0
19	K	Potassium	39	1.5
			40	4
			41	1.5
20	Ca	Calcium	40	0
			42	0
			43	3.5
			44	0
			46	0
			48	0
21	Sc	Scandium	45	3.5
22	Ti	Titanium	46	0
			47	2.5
			48	0
			49	3.5
			50	0
23	V	Vanadium	51	3.5
			50	6
24	Cr	Chromium	52	0
			50	0
			53	1.5
			54	0.5
25	Mn	Manganese	55	2.5
26	Fe	Iron	56	0
			54	0
			57	0.5
			58	0
27	Co	Cobalt	59	3.5
28	Ni	Nickel	58	0
29	Cu	Copper	63	1.5
30	Zn	Zinc	64	0
31	Ga	Gallium	69	1.5
32	Ge	Germanium	74	0
33	As	Arsenic	75	1.5
34	Se	Selenium	80	0
35	Br	Bromine	79	1.5
			81	1.5
36	Kr	Krypton	84	0
37	Rb	Rubidium	85	2.5
			87	1.5
38	Sr	Strontium	88	0
39	Y	Yttrium	89	0.5
40	Zr	Zirconium	90	0
41	Nb	Niobium	93	4.5
42	Mo	Molybdenum	98	0
			92	0
			94	0
			95	2.5
			96	0
			100	0
43	Tc	Technetium	99	2.5
44	Ru	Ruthenium	102	0
			99	2.5
			100	0
			101	2.5
			104	0
45	Rh	Rhodium	103	0.5
46	Pd	Palladium	106	0
			104	0
			105	2.5
			108	0
47	Ag	Silver	107	0.5
			109	0.5
48	Cd	Cadmium	114	0
			110	0
			111	0.5
			112	0
			113	0.5
			116	0
49	In	Indium	115	4.5
			113	4.5
50	Sn	Tin	120	0
51	Sb	Antimony	121	2.5
			123	3.5
52	Te	Tellurium	130	0
53	I	Iodine	127	2.5
54	Xe	Xenon	132	0
			129	0.5
			131	1.5
55	Cs	Caesium	133	3.5
56	Ba	Barium	138	0
57	La	Lanthanum	139	3.5
58	Ce	Cerium	140	0
59	Pr	Praseodymium	141	2.5
60	Nd	Neodymium	142	0
			143	3.5
			144	0
			145	3.5
			146	0
61	Pm	Promethium
62	Sm	Samarium	144	0
			150	0
			152	0
			154	0
63	Eu	Europium	151	2.5
			153	2.5
64	Gd	Gadolinium	154	0
			155	1.5
			156	0
			157	0
			158	0
			160	0
65	Tb	Terbium	159	1.5
66	Dy	Dysprosium	156	0
			158	0
			160	0
			161	2.5
			162	0
			163	2.5
			164	0
67	Ho	Holmium	165	3.5
68	Er	Erbium	162	0
			164	0
			166	0
			167	3.5
			168	0
			170	0
69	Tm	Thulium	169	0.5
70	Yb	Ytterbium	168	0
			170	0
			171	0.5
			172	0
			173	2.5
			174	0
			176	0
71	Lu	Lutetium	175	3.5
72	Hf	Hafnium	176	0
			177	3.5
			178	0
			179	4.5
			180	0
73	Ta	Tantalum	181	3.5
74	W	Tungsten	180	0
			182	0
			184	0
			186	0
75	Re	Rhenium	185	2.5
76	Os	Osmium	187	0.5
			188	0
			189	1.5
			190	0
			192	0
77	Ir	Iridium	191	1.5
			193	1.5
78	Pt	Platinum	192	0
			194	0
			195	0.5
			196	0
			198	0
79	Au	Gold	197	1.5
80	Hg	Mercury	196	0
			198	0
			199	0.5
			200	0
			201	1.5
			202	0
			204	0
81	Tl	Thallium	203	0.5
			205	0.5
82	Pb	Lead	206	0
			207	0.5
			208	0
83	Bi	Bismuth	209	4.5
84	Po	Polonium
85	At	Astatine
86	Rn	Radon
87	Fr	Francium
88	Ra	Radium
89	Ac	Actinium
90	Th	Thorium	232	0
91	Pa	Protactinium
92	U	Uranium	235	3.5
			238	0
93	Np	Neptunium
94	Pu	Plutonium
95	Am	Americium
96	Cm	Curium
97	Bk	Berkelium
98	Cf	Californium
99	Es	Einsteinium
100	Fm	Fermium
101	Md	Mendelevium
102	No	Nobelium
103	Lr	Lawrencium
104	Rf	Rutherfordium
105	Db	Dubnium
106	Sg	Seaborgium
107	Bh	Bohrium
108	Hs	Hassium
109	Mt	Meitnerium
110	Ds	Darmstadtium
111	Rg	Roentgenium
112	Cn	Copernicium
113	Uut	Ununtrium
114	Uuq	Ununquadium
115	Uup	Ununpentium
116	Uuh	Ununhexium
118	Uuo	Ununoctium