List of Periodic Table of the Elements definition of List of Periodic Table of the Elements in the Free Online Encyclopedia.

Periodic Table of the Elements
(showing atomic number and atomic symbol; click on atomic symbol for more detailed information)

Groups
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
1 H Periodic Table of the Elements: Hydrogen Atomic Number: 1 Atomic Symbol: H Hydrogen Atomic Weight: 1.00794 Electron Configuration: 1 ..... Click the link for more information.																	2 He Periodic Table of the Elements: Helium Atomic Number: 2 Atomic Symbol: He Helium Atomic Weight: 4.0026 Electron Configuration: 2 ..... Click the link for more information.
3 Li Periodic Table of the Elements: Lithium Atomic Number: 3 Atomic Symbol: Li Lithium Atomic Weight: 6.941 Electron Configuration: 2 · 1 ..... Click the link for more information.	4 Be Periodic Table of the Elements: Beryllium Atomic Number: 4 Atomic Symbol: Be Beryllium Atomic Weight: 9.01218 Electron Configuration: 2 · 2 ..... Click the link for more information.											5 B Periodic Table of the Elements: Boron Atomic Number: 5 Atomic Symbol: B Boron Atomic Weight: 10.81 Electron Configuration: 2 · 3 ..... Click the link for more information.	6 C Periodic Table of the Elements: Carbon Atomic Number: 6 Atomic Symbol: C Carbon Atomic Weight: 12.011 Electron Configuration: 2 · 4 ..... Click the link for more information.	7 N Periodic Table of the Elements: Nitrogen Atomic Number: 7 Atomic Symbol: N Nitrogen Atomic Weight: 14.0067 Electron Configuration: 2 · 5 ..... Click the link for more information.	8 O Periodic Table of the Elements: Oxygen Atomic Number: 8 Atomic Symbol: O Oxygen Atomic Weight: 15.9994 Electron Configuration: 2 · 6 ..... Click the link for more information.	9 F Periodic Table of the Elements: Fluorine Atomic Number: 9 Atomic Symbol: F Fluorine Atomic Weight: 18.998403 Electron Configuration: 2 · 7 ..... Click the link for more information.	10 Ne Periodic Table of the Elements: Neon Atomic Number: 10 Atomic Symbol: Ne Neon Atomic Weight: 20.179 Electron Configuration: 2 · 8 ..... Click the link for more information.
11 Na Periodic Table of the Elements: Sodium Atomic Number: 11 Atomic Symbol: Na Sodium Atomic Weight: 22.98977 Electron Configuration: 2 · 8 · 1 ..... Click the link for more information.	12 Mg Periodic Table of the Elements: Magnesium Atomic Number: 12 Atomic Symbol: Mg Magnesium Atomic Weight: 24.305 Electron Configuration: 2 · 8 · 2 ..... Click the link for more information.											13 Al Periodic Table of the Elements: Aluminum Atomic Number: 13 Atomic Symbol: Al Aluminum Atomic Weight: 26.98154 Electron Configuration: 2 · 8 · 3 ..... Click the link for more information.	14 Si Periodic Table of the Elements: Silicon Atomic Number: 14 Atomic Symbol: Si Silicon Atomic Weight: 28.0855 Electron Configuration: 2 · 8 · 4 ..... Click the link for more information.	15 P Periodic Table of the Elements: Phosphorus Atomic Number: 15 Atomic Symbol: P Phosphorus Atomic Weight: 30.97376 Electron Configuration: 2 · 8 · 5 ..... Click the link for more information.	16 S Periodic Table of the Elements: Sulfur Atomic Number: 16 Atomic Symbol: S Sulfur Atomic Weight: 32.06 Electron Configuration: 2 · 8 · 6 ..... Click the link for more information.	17 Cl Periodic Table of the Elements: Chlorine Atomic Number: 17 Atomic Symbol: Cl Chlorine Atomic Weight: 35.453 Electron Configuration: 2 · 8 · 7 ..... Click the link for more information.	18 Ar Periodic Table of the Elements: Argon Atomic Number: 18 Atomic Symbol: Ar Argon Atomic Weight: 39.948 Electron Configuration: 2 · 8 · 8 ..... Click the link for more information.
19 K Periodic Table of the Elements: Potassium Atomic Number: 19 Atomic Symbol: K Potassium Atomic Weight: 39.0983 Electron Configuration: 2 · 8 · 8 · 1 ..... Click the link for more information.	20 Ca Periodic Table of the Elements: Calcium Atomic Number: 20 Atomic Symbol: Ca Calcium Atomic Weight: 40.08 Electron Configuration: 2 · 8 · 8 · 2 ..... Click the link for more information.	21 Sc Periodic Table of the Elements: Scandium Atomic Number: 21 Atomic Symbol: Sc Scandium Atomic Weight: 44.9559 Electron Configuration: 2 · 8 · 9 · 2 ..... Click the link for more information.	22 Ti Periodic Table of the Elements: Titanium Atomic Number: 22 Atomic Symbol: Ti Titanium Atomic Weight: 47.88 Electron Configuration: 2 · 8 · 10 · 2 ..... Click the link for more information.	23 V Periodic Table of the Elements: Vanadium Atomic Number: 23 Atomic Symbol: V Vanadium Atomic Weight: 50.9415 Electron Configuration: 2 · 8 · 11 · 2 ..... Click the link for more information.	24 Cr Periodic Table of the Elements: Chromium Atomic Number: 24 Atomic Symbol: Cr Chromium Atomic Weight: 51.996 Electron Configuration: 2 · 8 · 13 · 1 ..... Click the link for more information.	25 Mn Periodic Table of the Elements: Manganese Atomic Number: 25 Atomic Symbol: Mn Manganese Atomic Weight: 54.9380 Electron Configuration: 2 · 8 · 13 · 2 ..... Click the link for more information.	26 Fe Periodic Table of the Elements: Iron Atomic Number: 26 Atomic Symbol: Fe Iron Atomic Weight: 55.847 Electron Configuration: 2 · 8 · 14 · 2 ..... Click the link for more information.	27 Co Periodic Table of the Elements: Cobalt Atomic Number: 27 Atomic Symbol: Co Cobalt Atomic Weight: 58.9332 Electron Configuration: 2 · 8 · 15 · 2 ..... Click the link for more information.	28 Ni Periodic Table of the Elements: Nickel Atomic Number: 28 Atomic Symbol: Ni Nickel Atomic Weight: 58.69 Electron Configuration: 2 · 8 · 16 · 2 ..... Click the link for more information.	29 Cu Periodic Table of the Elements: Copper Atomic Number: 29 Atomic Symbol: Cu Copper Atomic Weight: 63.546 Electron Configuration: 2 · 8 · 18 · 1 ..... Click the link for more information.	30 Zn Periodic Table of the Elements: Zinc Atomic Number: 30 Atomic Symbol: Zn Zinc Atomic Weight: 65.38 Electron Configuration: 2 · 8 · 18 · 2 ..... Click the link for more information.	31 Ga Periodic Table of the Elements: Gallium Atomic Number: 31 Atomic Symbol: Ga Gallium Atomic Weight: 69.72 Electron Configuration: 2 · 8 · 18 · 3 ..... Click the link for more information.	32 Ge Periodic Table of the Elements: Germanium Atomic Number: 32 Atomic Symbol: Ge Germanium Atomic Weight: 72.59 Electron Configuration: 2 · 8 · 18 · 4 ..... Click the link for more information.	33 As Periodic Table of the Elements: Arsenic Atomic Number: 33 Atomic Symbol: As Arsenic Atomic Weight: 74.9216 Electron Configuration: 2 · 8 · 18 · 5 ..... Click the link for more information.	34 Se Periodic Table of the Elements: Selenium Atomic Number: 34 Atomic Symbol: Se Selenium Atomic Weight: 78.96 Electron Configuration: 2 · 8 · 18 · 6 ..... Click the link for more information.	35 Br Periodic Table of the Elements: Bromine Atomic Number: 35 Atomic Symbol: Br Bromine Atomic Weight: 79.904 Electron Configuration: 2 · 8 · 18 · 7 ..... Click the link for more information.	36 Kr Periodic Table of the Elements: Krypton Atomic Number: 36 Atomic Symbol: Kr Krypton Atomic Weight: 83.80 Electron Configuration: 2 · 8 · 18 · 8 ..... Click the link for more information.
37 Rb Periodic Table of the Elements: Rubidium Atomic Number: 37 Atomic Symbol: Rb Rubidium Atomic Weight: 85.4678 Electron Configuration: 2 · 8 · 18 8 · 1 ..... Click the link for more information.	38 Sr Periodic Table of the Elements: Strontium Atomic Number: 38 Atomic Symbol: Sr Strontium Atomic Weight: 87.62 Electron Configuration: 2 · 8 · 18 8 · 2 ..... Click the link for more information.	39 Y Periodic Table of the Elements: Yttrium Atomic Number: 39 Atomic Symbol: Y Yttrium Atomic Weight: 88.9059 Electron Configuration: 2 · 8 · 18 9 · 2 ..... Click the link for more information.	40 Zr Periodic Table of the Elements: Zirconium Atomic Number: 40 Atomic Symbol: Zr Zirconium Atomic Weight: 91.22 Electron Configuration: 2 · 8 · 18 10 · 2 ..... Click the link for more information.	41 Nb Periodic Table of the Elements: Niobium Atomic Number: 41 Atomic Symbol: Nb Niobium Atomic Weight: 92.9064 Electron Configuration: 2 · 8 · 18 12 · 1 ..... Click the link for more information.	42 Mo Periodic Table of the Elements: Molybdenum Atomic Number: 42 Atomic Symbol: Mo Molybdenum Atomic Weight: 95.94 Electron Configuration: 2 · 8 · 18 13 · 1 ..... Click the link for more information.	43 Tc Periodic Table of the Elements: Technetium Atomic Number: 43 Atomic Symbol: Tc Technetium Atomic Weight: (98) Electron Configuration: 2 · 8 · 18 13 · 2 ..... Click the link for more information.	44 Ru Periodic Table of the Elements: Ruthenium Atomic Number: 44 Atomic Symbol: Ru Ruthenium Atomic Weight: 101.07 Electron Configuration: 2 · 8 · 18 15 · 1 ..... Click the link for more information.	45 Rh Periodic Table of the Elements: Rhodium Atomic Number: 45 Atomic Symbol: Rh Rhodium Atomic Weight: 102.9055 Electron Configuration: 2 · 8 · 18 16 · 1 ..... Click the link for more information.	46 Pd Periodic Table of the Elements: Palladium Atomic Number: 46 Atomic Symbol: Pd Palladium Atomic Weight: 106.42 Electron Configuration: 2 · 8 · 18 18 · 0 ..... Click the link for more information.	47 Ag Periodic Table of the Elements: Silver Atomic Number: 47 Atomic Symbol: Ag Silver Atomic Weight: 107.8682 Electron Configuration: 2 · 8 · 18 18 · 1 ..... Click the link for more information.	48 Cd Periodic Table of the Elements: Cadmium Atomic Number: 48 Atomic Symbol: Cd Cadmium Atomic Weight: 112.41 Electron Configuration: 2 · 8 · 18 18 · 2 ..... Click the link for more information.	49 In Periodic Table of the Elements: Indium Atomic Number: 49 Atomic Symbol: In Indium Atomic Weight: 114.82 Electron Configuration: 2 · 8 · 18 18 · 3 ..... Click the link for more information.	50 Sn Periodic Table of the Elements: Tin Atomic Number: 50 Atomic Symbol: Sn Tin Atomic Weight: 118.69 Electron Configuration: 2 · 8 · 18 18 · 4 ..... Click the link for more information.	51 Sb Periodic Table of the Elements: Antimony Atomic Number: 51 Atomic Symbol: Sb Antimony Atomic Weight: 121.75 Electron Configuration: 2 · 8 · 18 18 · 5 ..... Click the link for more information.	52 Te Periodic Table of the Elements: Tellurium Atomic Number: 52 Atomic Symbol: Te Tellurium Atomic Weight: 127.60 Electron Configuration: 2 · 8 · 18 18 · 6 ..... Click the link for more information.	53 I Periodic Table of the Elements: Iodine Atomic Number: 53 Atomic Symbol: I Iodine Atomic Weight: 126.9045 Electron Configuration: 2 · 8 · 18 18 · 7 ..... Click the link for more information.	54 Xe Periodic Table of the Elements: Xenon Atomic Number: 54 Atomic Symbol: Xe Xenon Atomic Weight: 131.29 Electron Configuration: 2 · 8 · 18 18 · 8 ..... Click the link for more information.
55 Cs Periodic Table of the Elements: Cesium Atomic Number: 55 Atomic Symbol: Cs Cesium Atomic Weight: 132.9054 Electron Configuration: 2 · 8 · 18 18 · 8 · 1 ..... Click the link for more information.	56 Ba Periodic Table of the Elements: Barium Atomic Number: 56 Atomic Symbol: Ba Barium Atomic Weight: 137.33 Electron Configuration: 2 · 8 · 18 18 · 8 · 2 ..... Click the link for more information.	57–71 Lanthanide Series	72 Hf Periodic Table of the Elements: Hafnium Atomic Number: 72 Atomic Symbol: Hf Hafnium Atomic Weight: 178.49 Electron Configuration: 2 · 8 · 18 32 · 10 · 2 ..... Click the link for more information.	73 Ta Periodic Table of the Elements: Tantalum Atomic Number: 73 Atomic Symbol: Ta Tantalum Atomic Weight: 180.9479 Electron Configuration: 2 · 8 · 18 32 · 11 · 2 ..... Click the link for more information.	74 W Periodic Table of the Elements: Tungsten Atomic Number: 74 Atomic Symbol: W Tungsten Atomic Weight: 183.85 Electron Configuration: 2 · 8 · 18 32 · 12 · 2 ..... Click the link for more information.	75 Re Periodic Table of the Elements: Rhenium Atomic Number: 75 Atomic Symbol: Re Rhenium Atomic Weight: 186.207 Electron Configuration: 2 · 8 · 18 32 · 13 · 2 ..... Click the link for more information.	76 Os Periodic Table of the Elements: Osmium Atomic Number: 76 Atomic Symbol: Os Osmium Atomic Weight: 190.2 Electron Configuration: 2 · 8 · 18 32 · 14 · 2 ..... Click the link for more information.	77 Ir Periodic Table of the Elements: Iridium Atomic Number: 77 Atomic Symbol: Ir Iridium Atomic Weight: 192.22 Electron Configuration: 2 · 8 · 18 32 · 15 · 2 ..... Click the link for more information.	78 Pt Periodic Table of the Elements: Platinum Atomic Number: 78 Atomic Symbol: Pt Platinum Atomic Weight: 195.08 Electron Configuration: 2 · 8 · 18 32 · 16 · 2 ..... Click the link for more information.	79 Au Periodic Table of the Elements: Gold Atomic Number: 79 Atomic Symbol: Au Gold Atomic Weight: 196.9665 Electron Configuration: 2 · 8 · 18 32 · 18 · 1 ..... Click the link for more information.	80 Hg Periodic Table of the Elements: Mercury Atomic Number: 80 Atomic Symbol: Hg Mercury Atomic Weight: 200.59 Electron Configuration: 2 · 8 · 18 32 · 18 · 2 ..... Click the link for more information.	81 Tl Periodic Table of the Elements: Thallium Atomic Number: 81 Atomic Symbol: Tl Thallium Atomic Weight: 204.383 Electron Configuration: 2 · 8 · 18 32 · 18 · 3 ..... Click the link for more information.	82 Pb Periodic Table of the Elements: Lead Atomic Number: 82 Atomic Symbol: Pb Lead Atomic Weight: 207.2 Electron Configuration: 2 · 8 · 18 32 · 18 · 4 ..... Click the link for more information.	83 Bi Periodic Table of the Elements: Bismuth Atomic Number: 83 Atomic Symbol: Bi Bismuth Atomic Weight: 208.9804 Electron Configuration: 2 · 8 · 18 32 · 18 · 5 ..... Click the link for more information.	84 Po Periodic Table of the Elements: Polonium Atomic Number: 84 Atomic Symbol: Po Polonium Atomic Weight: (209) Electron Configuration: 2 · 8 · 18 32 · 18 · 6 ..... Click the link for more information.	85 At Periodic Table of the Elements: Astatine Atomic Number: 85 Atomic Symbol: At Astatine Atomic Weight: (210) Electron Configuration: 2 · 8 · 18 32 · 18 · 7 ..... Click the link for more information.	86 Rn Periodic Table of the Elements: Radon Atomic Number: 86 Atomic Symbol: Rn Radon Atomic Weight: (222) Electron Configuration: 2 · 8 · 18 32 · 18 · 8 ..... Click the link for more information.
87 Fr Periodic Table of the Elements: Francium Atomic Number: 87 Atomic Symbol: Fr Francium Atomic Weight: (223) Electron Configuration: 2 · 8 · 18 32 · 18 8 · 1 ..... Click the link for more information.	88 Ra Periodic Table of the Elements: Radium Atomic Number: 88 Atomic Symbol: Ra Radium Atomic Weight: 226.0254 Electron Configuration: 2 · 8 · 18 32 · 18 8 · 2 ..... Click the link for more information.	89–103 Actinide Series	104 Rf Periodic Table of the Elements: Rutherfordium Atomic Number: 104 Atomic Symbol: Rf Rutherfordium Atomic Weight: (261) Electron Configuration: 2 · 8 · 18 32 · 32 10 · 2 ..... Click the link for more information.	105 Db Periodic Table of the Elements: Dubnium Atomic Number: 105 Atomic Symbol: Db Dubnium Atomic Weight: (262) Electron Configuration: 2 · 8 · 18 32 · 32 11 · 2 ..... Click the link for more information.	106 Sg Periodic Table of the Elements: Seaborgium Atomic Number: 106 Atomic Symbol: Sg Seaborgium Atomic Weight: (266) Electron Configuration: 2 · 8 · 18 32 · 32 12 · 2 ..... Click the link for more information.	107 Bh Periodic Table of the Elements: Bohrium Atomic Number: 107 Atomic Symbol: Bh Bohrium Atomic Weight: (262) Electron Configuration: 2 · 8 · 18 32 · 32 13 · 2 ..... Click the link for more information.	108 Hs Periodic Table of the Elements: Hassium Atomic Number: 108 Atomic Symbol: Hs Hassium Atomic Weight: (265) Electron Configuration: 2 · 8 · 18 32 · 32 14 · 2 ..... Click the link for more information.	109 Mt Periodic Table of the Elements: Meitnerium Atomic Number: 109 Atomic Symbol: Mt Meitnerium Atomic Weight: (266) Electron Configuration: 2 · 8 · 18 32 · 32 15 · 2 ..... Click the link for more information.	110 Ds Periodic Table of the Elements: Darmstadtium Atomic Number: 110 Atomic Symbol: Ds Darmstadtium Atomic Weight: (271) Electron Configuration: 2 · 8 · 18 32 · 32 17 · 1 ..... Click the link for more information.	111 Rg Periodic Table of the Elements: Roentgenium Atomic Number: 111 Atomic Symbol: Rg Roentgenium Atomic Weight: (272) Electron Configuration: 2 · 8 · 18 32 · 32 18 · 1 ..... Click the link for more information.	112 Uub Periodic Table of the Elements: Ununbium Atomic Number: 112 Atomic Symbol: Uub Ununbium Atomic Weight: (285) Electron Configuration: 2 · 8 · 18 32 · 32 18 · 2 ..... Click the link for more information.	113 Uub Periodic Table of the Elements: Ununtrium Atomic Number: 113 Atomic Symbol: Uut Ununtrium Atomic Weight: (284) Electron Configuration: 2 · 8 · 18 32 · 32 18 · 6 ..... Click the link for more information.	114 Uuq Periodic Table of the Elements: Ununquadium Atomic Number: 114 Atomic Symbol: Uuq Ununquadium Atomic Weight: (289) Electron Configuration: 2 · 8 · 18 32 · 32 18 · 4 ..... Click the link for more information.	115 Uuq Periodic Table of the Elements: Ununpentium Atomic Number: 115 Atomic Symbol: Uup Ununpentium Atomic Weight: (288) Electron Configuration: 2 · 8 · 18 32 · 32 18 · 6 ..... Click the link for more information.	116 Uuh Periodic Table of the Elements: Ununhexium Atomic Number: 116 Atomic Symbol: Uuh Ununhexium Atomic Weight: (292) Electron Configuration: 2 · 8 · 18 32 · 32 18 · 6 ..... Click the link for more information.		118 Uuo Periodic Table of the Elements: Ununoctium Atomic Number: 118 Atomic Symbol: Uuo Ununoctium Atomic Weight: (294) Electron Configuration: 2 · 8 · 18 32 · 32 18 · 8 ..... Click the link for more information.
Lanthanide Series lanthanide series, a series of metallic elements, included in the rare-earth metals , in Group 3 of the periodic table . Members of the series are often called lanthanides, although lanthanum (atomic number 57) is not always considered a member of the series. ..... Click the link for more information. (Rare Earth Elements)
57 La Periodic Table of the Elements: Lanthanum Atomic Number: 57 Atomic Symbol: La Lanthanum Atomic Weight: 138.9055 Electron Configuration: 2 · 8 · 18 18 · 9 · 2 ..... Click the link for more information.	58 Ce Periodic Table of the Elements: Cerium Atomic Number: 58 Atomic Symbol: Ce Cerium Atomic Weight: 140.12 Electron Configuration: 2 · 8 · 18 20 · 8 · 2 ..... Click the link for more information.	59 Pr Periodic Table of the Elements: Praseodymium Atomic Number: 59 Atomic Symbol: Pr Praseodymium Atomic Weight: 140.9077 Electron Configuration: 2 · 8 · 18 21 · 8 · 2 ..... Click the link for more information.	60 Nd Periodic Table of the Elements: Neodymium Atomic Number: 60 Atomic Symbol: Nd Neodymium Atomic Weight: 144.24 Electron Configuration: 2 · 8 · 18 22 · 8 · 2 ..... Click the link for more information.	61 Pm Periodic Table of the Elements: Promethium Atomic Number: 61 Atomic Symbol: Pm Promethium Atomic Weight: (145) Electron Configuration: 2 · 8 · 18 23 · 8 · 2 ..... Click the link for more information.	62 Sm Periodic Table of the Elements: Samarium Atomic Number: 62 Atomic Symbol: Sm Samarium Atomic Weight: 150.36 Electron Configuration: 2 · 8 · 18 24 · 8 · 2 ..... Click the link for more information.	63 Eu Periodic Table of the Elements: Europium Atomic Number: 63 Atomic Symbol: Eu Europium Atomic Weight: 151.96 Electron Configuration: 2 · 8 · 18 25 · 8 · 2 ..... Click the link for more information.	64 Gd Periodic Table of the Elements: Gadolinium Atomic Number: 64 Atomic Symbol: Gd Gadolinium Atomic Weight: 157.25 Electron Configuration: 2 · 8 · 18 25 · 9 · 2 ..... Click the link for more information.	65 Tb Periodic Table of the Elements: Terbium Atomic Number: 65 Atomic Symbol: Tb Terbium Atomic Weight: 158.9254 Electron Configuration: 2 · 8 · 18 27 · 8 · 2 ..... Click the link for more information.	66 Dy Periodic Table of the Elements: Dysprosium Atomic Number: 66 Atomic Symbol: Dy Dysprosium Atomic Weight: 162.50 Electron Configuration: 2 · 8 · 18 28 · 8 · 2 ..... Click the link for more information.	67 Ho Periodic Table of the Elements: Holmium Atomic Number: 67 Atomic Symbol: Ho Holmium Atomic Weight: 164.9304 Electron Configuration: 2 · 8 · 18 29 · 8 · 2 ..... Click the link for more information.	68 Er Periodic Table of the Elements: Erbium Atomic Number: 68 Atomic Symbol: Er Erbium Atomic Weight: 167.26 Electron Configuration: 2 · 8 · 18 30 · 8 · 2 ..... Click the link for more information.	69 Tm Periodic Table of the Elements: Thulium Atomic Number: 69 Atomic Symbol: Tm Thulium Atomic Weight: 168.9342 Electron Configuration: 2 · 8 · 18 31 · 8 · 2 ..... Click the link for more information.	70 Yb Periodic Table of the Elements: Ytterbium Atomic Number: 70 Atomic Symbol: Yb Ytterbium Atomic Weight: 173.04 Electron Configuration: 2 · 8 · 18 32 · 8 · 2 ..... Click the link for more information.	71 Lu Periodic Table of the Elements: Lutetium Atomic Number: 71 Atomic Symbol: Lu Lutetium Atomic Weight: 174.967 Electron Configuration: 2 · 8 · 18 32 · 9 · 2 ..... Click the link for more information.
Actinide Series actinide series, a series of radioactive metallic elements in Group 3 of the periodic table . Members of the series are often called actinides, although actinium (at. no. 89) is not always considered a member of the series. ..... Click the link for more information. (Radioactive Rare Earth Elements)
89 Ac Periodic Table of the Elements: Actinium Atomic Number: 89 Atomic Symbol: Ac Actinium Atomic Weight: 227.0278 Electron Configuration: 2 · 8 · 18 32 · 18 9 · 2 ..... Click the link for more information.	90 Th Periodic Table of the Elements: Thorium Atomic Number: 90 Atomic Symbol: Th Thorium Atomic Weight: 232.0381 Electron Configuration: 2 · 8 · 18 32 · 18 10 · 2 ..... Click the link for more information.	91 Pa Periodic Table of the Elements: Protactinium Atomic Number: 91 Atomic Symbol: Pa Protactinium Atomic Weight: 231.0359 Electron Configuration: 2 · 8 · 18 32 · 20 9 · 2 ..... Click the link for more information.	92 U Periodic Table of the Elements: Uranium Atomic Number: 92 Atomic Symbol: U Uranium Atomic Weight: 238.0289 Electron Configuration: 2 · 8 · 18 32 · 21 9 · 2 ..... Click the link for more information.	93 Np Periodic Table of the Elements: Neptunium Atomic Number: 93 Atomic Symbol: Np Neptunium Atomic Weight: 237.0482 Electron Configuration: 2 · 8 · 18 32 · 22 9 · 2 ..... Click the link for more information.	94 Pu Periodic Table of the Elements: Plutonium Atomic Number: 94 Atomic Symbol: Pu Plutonium Atomic Weight: (244) Electron Configuration: 2 · 8 · 18 32 · 24 8 · 2 ..... Click the link for more information.	95 Am Periodic Table of the Elements: Americium Atomic Number: 95 Atomic Symbol: Am Americium Atomic Weight: (243) Electron Configuration: 2 · 8 · 18 32 · 25 8 · 2 ..... Click the link for more information.	96 Cm Periodic Table of the Elements: Curium Atomic Number: 96 Atomic Symbol: Cm Curium Atomic Weight: (247) Electron Configuration: 2 · 8 · 18 32 · 25 9 · 2 ..... Click the link for more information.	97 Bk Periodic Table of the Elements: Berkelium Atomic Number: 97 Atomic Symbol: Bk Berkelium Atomic Weight: (247) Electron Configuration: 2 · 8 · 18 32 · 27 8 · 2 ..... Click the link for more information.	98 Cf Periodic Table of the Elements: Californium Atomic Number: 98 Atomic Symbol: Cf Californium Atomic Weight: (251) Electron Configuration: 2 · 8 · 18 32 · 28 8 · 2 ..... Click the link for more information.	99 Es Periodic Table of the Elements: Einsteinium Atomic Number: 99 Atomic Symbol: Es Einsteinium Atomic Weight: (252) Electron Configuration: 2 · 8 · 18 32 · 29 8 · 2 ..... Click the link for more information.	100 Fm Periodic Table of the Elements: Fermium Atomic Number: 100 Atomic Symbol: Fm Fermium Atomic Weight: (257) Electron Configuration: 2 · 8 · 18 32 · 30 8 · 2 ..... Click the link for more information.	101 Md Periodic Table of the Elements: Mendelevium Atomic Number: 101 Atomic Symbol: Md Mendelevium Atomic Weight: (258) Electron Configuration: 2 · 8 · 18 32 · 31 8 · 2 ..... Click the link for more information.	102 No Periodic Table of the Elements: Nobelium Atomic Number: 102 Atomic Symbol: No Nobelium Atomic Weight: (259) Electron Configuration: 2 · 8 · 18 32 · 32 8 · 2 ..... Click the link for more information.	103 Lr Periodic Table of the Elements: Lawrencium Atomic Number: 103 Atomic Symbol: Lr Lawrencium Atomic Weight: (262) Electron Configuration: 2 · 8 · 18 32 · 32 9 · 2 ..... Click the link for more information.