This table gives information about elements. Elements are grouped into eight classes according to their properties. Each class is shown in a different color. Hydrogen does not belong to any one class. Click the name of an element to see its description.

		1			New			Alkali metals Actinide series C Solid Alkaline earth metals Other metals Br Liquid Transition metals Nonmetals H Gas Lanthanide series Noble gases Tc Synthetic																																													18
		IA			Original																																																VIIIA
1		1 H Hydrogen 1.00794	1		2																																	13			14			15			16			17			2 He Helium 4.002602	2
					IIA																																	IIIA			IVA			VA			VIA			VIIA
2		3 Li Lithium 6.941	2 1		4 Be Beryllium 9.012182	2 2																																5 B Boron 10.811	2 3		6 C Carbon 12.0107	2 4		7 N Nitrogen 14.00674	2 5		8 O Oxygen 15.9994	2 6		9 F Fluorine 18.9984032	2 7		10 Ne Neon 20.1797	2 8
3	11 Na Sodium 22.989770	2 8 1	12 Mg Magnesium 24.3050	2 8 2	3			4			5			6			7			8			9			10			11			12		13 Al Aluminum 26.981538	2 8 3		14 Si Silicon 28.0855	2 8 4	15 P Phosphorus 30.973761	2 8 5	16 S Sulfur 32.066	2 8 6		17 Cl Chlorine 35.4527	2 8 7		18 Ar Argon 39.948	2 8 8
					IIIB			IVB			VB			VIB			VIIB						VIIIB						IB			IIB
4	19 K Potassium 39.0983	2 8 8 1	20 Ca Calcium 40.078	2 8 8 2	21 Sc Scandium 44.955910	2 8 9 2	22 Ti Titanium 47.867	2 8 10 2	23 V Vanadium 50.9415	2 8 11 2	24 Cr Chromium 51.9961	2 8 13 1	25 Mn Manganese 54.938049	2 8 13 2	26 Fe Iron 55.8457	2 8 14 2	27 Co Cobalt 58.933200	2 8 15 2	28 Ni Nickel 58.6934	2 8 16 2	29 Cu Copper 63.546	2 8 18 1	30 Zn Zinc 65.39	2 8 18 2	31 Ga Gallium 69.723	2 8 18 3		32 Ge Germanium 72.61	2 8 18 4		33 As Arsenic 74.92160	2 8 18 5	34 Se Selenium 78.96	2 8 18 6	35 Br Bromine 79.904	2 8 18 7	36 Kr Krypton 83.80	2 8 18 8
5	37 Rb Rubidium 85.4678	2 8 18 8 1	38 Sr Strontium 87.62	2 8 18 8 2	39 Y Yttrium 88.90585	2 8 18 9 2	40 Zr Zirconium 91.224	2 8 18 10 2	41 Nb Niobium 92.90638	2 8 18 12 1	42 Mo Molybdenum 95.94	2 8 18 13 1	43 Tc Technetium (98)	2 8 18 13 2	44 Ru Ruthenium 101.07	2 8 18 15 1	45 Rh Rhodium 102.90550	2 8 18 16 1	46 Pd Palladium 106.42	2 8 18 18 0	47 Ag Silver 107.8682	2 8 18 18 1	48 Cd Cadmium 112.411	2 8 18 18 2	49 In Indium 114.818	2 8 18 18 3	50 Sn Tin 118.710	2 8 18 18 4		51 Sb Antimony 121.760	2 8 18 18 5		52 Te Tellurium 127.60	2 8 18 18 6	53 I Iodine 126.90447	2 8 18 18 7	54 Xe Xenon 131.29	2 8 18 18 8
6	55 Cs Cesium 132.90545	2 8 18 18 8 1	56 Ba Barium 137.327	2 8 18 18 8 2		57 to 71			72 Hf Hafnium 178.49	2 8 18 32 10 2	73 Ta Tantalum 180.9479	2 8 18 32 11 2	74 W Tungsten 183.84	2 8 18 32 12 2	75 Re Rhenium 186.207	2 8 18 32 13 2	76 Os Osmium 190.23	2 8 18 32 14 2	77 Ir Iridium 192.217	2 8 18 32 15 2	78 Pt Platinum 195.078	2 8 18 32 17 1	79 Au Gold 196.96655	2 8 18 32 18 1	80 Hg Mercury 200.59	2 8 18 32 18 2	81 Tl Thallium 204.3833	2 8 18 32 18 3	82 Pb Lead 207.2	2 8 18 32 18 4	83 Bi Bismuth 208.98038	2 8 18 32 18 5		84 Po Polonium (209)	2 8 18 32 18 6		85 At Astatine (210)	2 8 18 32 18 7	86 Rn Radon (222)	2 8 18 32 18 8
7	87 Fr Francium (223)	2 8 18 32 18 8 1	88 Ra Radium (226)	2 8 18 32 18 8 2	89 to 103		104 Rf Rutherfordium (261)	2 8 18 32 32 10 2	105 Db Dubnium (262)	2 8 18 32 32 11 2	106 Sg Seaborgium (263)	2 8 18 32 32 12 2	107 Bh Bohrium (262)	2 8 18 32 32 13 2	108 Hs Hassium (265)	2 8 18 32 32 14 2	109 Mt Meitnerium (266)	2 8 18 32 32 15 2	110 Uun Ununnilium (269)	2 8 18 32 32 17 1	111 Uuu Unununium (272)	2 8 18 32 32 18 1	112 Uub Ununbium (277)	2 8 18 32 32 18 2	113		114 Uuq Ununquadium (289)		115		116 Uuh Ununhexium (289)			117			118 Uuo Ununoctium (293)
										Atomic masses in parentheses are those of the most stable or common isotope.
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Note: The subgroup numbers 1-18 were adopted in 1984 by the International Union of Pure and Applied Chemistry. The names of elements 110-118 are the Latin equivalents of those numbers.										57 La Lanthanum 138.9055	2 8 18 18 9 2	58 Ce Cerium 140.116	2 8 18 20 8 2	59 Pr Praseodymium 140.90765	2 8 18 21 8 2	60 Nd Neodymium 144.24	2 8 18 22 8 2	61 Pm Promethium (145)	2 8 18 23 8 2	62 Sm Samarium 150.36	2 8 18 24 8 2	63 Eu Europium 151.964	2 8 18 25 8 2	64 Gd Gadolinium 157.25	2 8 18 25 9 2	65 Tb Terbium 158.92534	2 8 18 27 8 2	66 Dy Dysprosium 162.50	2 8 18 28 8 2	67 Ho Holmium 164.93032	2 8 18 29 8 2	68 Er Erbium 167.26	2 8 18 30 8 2	69 Tm Thulium 168.93421	2 8 18 31 8 2	70 Yb Ytterbium 173.04	2 8 18 32 8 2		71 Lu Lutetium 174.967	2 8 18 32 9 2
										89 Ac Actinium (227)	2 8 18 32 18 9 2	90 Th Thorium 232.0381	2 8 18 32 18 10 2	91 Pa Protactinium 231.03588	2 8 18 32 20 9 2	92 U Uranium 238.0289	2 8 18 32 21 9 2	93 Np Neptunium (237)	2 8 18 32 22 9 2	94 Pu Plutonium (244)	2 8 18 32 24 8 2	95 Am Americium (243)	2 8 18 32 25 8 2	96 Cm Curium (247)	2 8 18 32 25 9 2	97 Bk Berkelium (247)	2 8 18 32 26 9 2	98 Cf Californium (251)	2 8 18 32 28 8 2	99 Es Einsteinium (252)	2 8 18 32 29 8 2	100 Fm Fermium (257)	2 8 18 32 30 8 2	101 Md Mendelevium (258)	2 8 18 32 31 8 2	102 No Nobelium (259)	2 8 18 32 32 8 2		103 Lr Lawrencium (262)	2 8 18 32 32 9 2