Periodic Table of the Elements Electronegativity 1 2 H Hydrogen 2.20 3 Li Lithium 0.98 11 Na Sodium 0.93 19 K Potassium 0.82 37 Rb Rubidium 0.82 55 Cs Cesium 0.79 87 Fr Francium 0.7 4 Helium no data Number Be 5 Symbol Beryllium 1.57 1.0 Name 12 1.3 1.6 1.9 2.2 2.5 2.8 13 Ca Calcium 1.00 38 Sr Ba Sc 39 Yttrium 1.22 57-71 Ra 23 Ti Titanium 1.54 40 Y Rf Rutherfordium no data 57 Lanthanide Series Lanthanum 1.10 89 Actinide Series La Ac Actinium 1.1 74 Tantalum 1.5 Cerium 1.12 90 Th Thorium 1.3 59 43 Technetium 1.9 Re Tungsten 2.36 Rhenium 1.9 107 Seaborgium no data Pr Tc 75 W Sg Bh Bohrium no data 60 Nd Praseodymium Neodymium 1.13 1.14 91 Pa Protactinium 1.5 92 26 Manganese 1.55 106 Dubnium no data Ce Chromium 1.66 Molybdenum 2.16 Ta 58 Mn Mo Niobium 1.6 Db 25 Cr 42 Nb 105 104 Radium 0.89 Vanadium 1.63 73 Hf Hafnium 1.3 89-103 24 V 41 Zr Zirconium 1.33 72 Barium 0.89 88 22 Scandium 1.36 Strontium 0.95 56 Carbon 2.55 14 Al U Uranium 1.38 Fe Iron 1.83 44 Ru Ruthenium 2.2 76 Os 27 Co Cobalt 1.88 45 Rh Rhodium 2.28 77 Hs Hassium no data 61 Iridium 2.2 Mt Meitnerium no data 62 Promethium 1.13 93 Np Neptunium 1.36 Samarium 1.17 94 Pu Plutonium 1.28 63 Cu 46 47 Pd Ag Palladium 2.20 Silver 1.93 79 Pt 110 Ds Au Gold 2.54 111 Rg Darmstadtium Roentgenium no data no data Eu Europium 1.2 95 64 Gd Gadolinium 1.2 96 Am Cm Americium 1.3 30 Curium 1.3 65 31 Zn Copper 1.90 Platinum 2.28 109 Pm Sm 29 Ni Nickel 1.91 78 Ir Osmium 2.2 108 28 Ga Zinc 1.65 Gallium 1.81 48 49 Cd Cadmium 1.69 80 Mercury 2.00 Cn 113 Copernicium no data Tb Terbium 1.22 97 Bk Berkelium 1.3 Nh Nihonium no data 66 Dy Dysprosium 1.23 98 Cf Californium 1.3 As Arsenic 2.18 51 Sn Sb Antimony 2.05 83 Pb Lead 2.33 Fl Flerovium no data Ho Holmium 1.24 Es Einsteinium 1.3 68 10 F Ne Fluorine 3.98 Neon no data 17 S 18 Cl Sulfur 2.58 Chlorine 3.16 34 Se Selenium 2.55 52 Te Po Polonium 2.0 36 Br Bromine 2.96 53 Ar Argon no data 35 Tellurium 2.1 84 Bi Bismuth 2.02 114 67 99 33 Germanium 2.01 82 Thallium 1.62 112 Ge Tin 1.96 Tl Oxygen 3.44 16 P 9 O Phosphorus 2.19 32 Indium 1.78 81 Hg 15 Silicon 1.90 50 In 8 N Nitrogen 3.04 Si Aluminum 1.61 21 7 C Boron 2.04 Magnesium 1.31 20 6 B 3.1 Electronegativity Mg He Kr Krypton 3.00 54 I Xe Iodine 2.66 Xenon 2.6 85 86 At Rn Astatine 2.2 Radon no data 115 116 117 118 Moscovium no data Livermorium no data Tennessine no data Oganesson no data Mc Er Erbium 1.24 100 Lv 69 Tm Thulium 1.25 101 Fm Md Fermium 1.3 Mendelevium 1.3 70 Ts Yb Ytterbium 1.1 102 No Nobelium 1.3 71 Og Lu Lutetium 1.27 103 Lr Lawrencium no data © 2017 Todd Helmenstine sciencenotes.org