1H2He3Li4Be5B6C7N8O9F10Ne11Na12Mg13Al14Si15P16S17Cl18Ar19K20Ca21Sc22Ti23V24Cr25Mn26Fe27Co28Ni29Cu30Zn31Ga32Ge33As34Se35Br36Kr37Rb38Sr39Y40Zr41Nb42Mo43Tc44Ru45Rh46Pd47Ag48Cd49In50Sn51Sb52Te53I54Xe55Cs56BaLa*Lanthanides57La58Ce59Pr60Nd61Pm62Sm63Eu64Gd65Tb66Dy67Ho68Er69Tm70Yb71Lu72Hf73Ta74W75Re76Os77Ir78Pt79Au80Hg81Tl82Pb83Bi84Po85At86Rn87Fr88RaAc*Actinides89Ac90Th91Pa92U93Np94Pu95Am96Cm97Bk98Cf99Es100Fm101Md102No103Lr104Rf105Db106Sg107Bh108Hs109Mt110Ds111Rg112Cn113Nh114Fl115Mc116Lv117Ts118Og
Covalent radius
The covalent radius is defined as half the distance between two atoms of the same element that are covalently bonded. It depends on the type of bond (single, double, ...) and the electronegativity of the bonding partners.
| Element | Covalent radius | ||
|---|---|---|---|
| 1H | Hydrogen | 31 ±5 pm | |
| 2He | Helium | 28 pm | |
| 3Li | Lithium | 128 ±7 pm | |
| 4Be | Beryllium | 96 ±3 pm | |
| 5B | Boron | 84 ±3 pm | |
| 6C | Carbon | 76 pm | |
| 7N | Nitrogen | 71 ±1 pm | |
| 8O | Oxygen | 66 ±2 pm | |
| 9F | Fluorine | 64 pm | |
| 10Ne | Neon | 58 pm | |
| 11Na | Sodium | 166 ±9 pm | |
| 12Mg | Magnesium | 141 ±7 pm | |
| 13Al | Aluminum | 121 ±4 pm | |
| 14Si | Silicon | 111 pm | |
| 15P | Phosphorus | 107 ±3 pm | |
| 16S | Sulfur | 105 ±3 pm | |
| 17Cl | Chlorine | 102 ±4 pm | |
| 18Ar | Argon | 106 ±10 pm | |
| 19K | Potassium | 203 ±12 pm | |
| 20Ca | Calcium | 176 ±10 pm | |
| 21Sc | Scandium | 170 ±7 pm | |
| 22Ti | Titanium | 160 ±8 pm | |
| 23V | Vanadium | 153 ±8 pm | |
| 24Cr | Chromium | 139 ±5 pm | |
| 25Mn | Manganese | 139 ±5 pm | |
| 26Fe | Iron | 132 ±3 pm | |
| 27Co | Cobalt | 126 ±3 pm | |
| 28Ni | Nickel | 124 ±4 pm | |
| 29Cu | Copper | 132 ±4 pm | |
| 30Zn | Zinc | 122 ±4 pm | |
| 31Ga | Gallium | 122 ±3 pm | |
| 32Ge | Germanium | 122 pm | |
| 33As | Arsenic | 119 ±4 pm | |
| 34Se | Selenium | 120 ±4 pm | |
| 35Br | Bromine | 120 ±3 pm | |
| 36Kr | Krypton | 116 ±4 pm | |
| 37Rb | Rubidium | 220 ±9 pm | |
| 38Sr | Strontium | 195 ±10 pm | |
| 39Y | Yttrium | 190 ±7 pm | |
| 40Zr | Zirconium | 175 ±7 pm | |
| 41Nb | Niobium | 164 ±6 pm | |
| 42Mo | Molybdenum | 154 ±5 pm | |
| 43Tc | Technetium | 147 ±7 pm | |
| 44Ru | Ruthenium | 146 ±7 pm | |
| 45Rh | Rhodium | 142 ±7 pm | |
| 46Pd | Palladium | 139 ±6 pm | |
| 47Ag | Silver | 145 ±5 pm | |
| 48Cd | Cadmium | 144 ±9 pm | |
| 49In | Indium | 142 ±5 pm | |
| 50Sn | Tin | 139 ±4 pm | |
| 51Sb | Antimony | 139 ±5 pm | |
| 52Te | Tellurium | 138 ±4 pm | |
| 53I | Iodine | 139 ±3 pm | |
| 54Xe | Xenon | 140 ±9 pm | |
| 55Cs | Caesium | 244 ±11 pm | |
| 56Ba | Barium | 215 ±11 pm | |
| 57La | Lanthanum | 207 ±8 pm | |
| 58Ce | Cerium | 204 ±9 pm | |
| 59Pr | Praseodymium | 203 ±7 pm | |
| 60Nd | Neodymium | 201 ±6 pm | |
| 61Pm | Promethium | 199 pm | |
| 62Sm | Samarium | 198 ±8 pm | |
| 63Eu | Europium | 198 ±6 pm | |
| 64Gd | Gadolinium | 196 ±6 pm | |
| 65Tb | Terbium | 194 ±5 pm | |
| 66Dy | Dysprosium | 192 ±7 pm | |
| 67Ho | Holmium | 192 ±7 pm | |
| 68Er | Erbium | 189 ±6 pm | |
| 69Tm | Thulium | 190 ±10 pm | |
| 70Yb | Ytterbium | 187 ±8 pm | |
| 71Lu | Lutetium | 187 ±8 pm | |
| 72Hf | Hafnium | 175 ±10 pm | |
| 73Ta | Tantalum | 170 ±8 pm | |
| 74W | Tungsten | 162 ±7 pm | |
| 75Re | Rhenium | 151 ±7 pm | |
| 76Os | Osmium | 144 ±4 pm | |
| 77Ir | Iridium | 141 ±6 pm | |
| 78Pt | Platinum | 136 ±5 pm | |
| 79Au | Gold | 136 ±6 pm | |
| 80Hg | Mercury | 132 ±5 pm | |
| 81Tl | Thallium | 145 ±7 pm | |
| 82Pb | Lead | 146 ±5 pm | |
| 83Bi | Bismuth | 148 ±4 pm | |
| 84Po | Polonium | 140 ±4 pm | |
| 86Rn | Radon | 150 pm | |
| 87Fr | Francium | (260 pm) | |
| 88Ra | Radium | 221 ±2 pm | |
| 89Ac | Actinium | 215 pm | |
| 90Th | Thorium | 206 ±6 pm | |
| 91Pa | Protactinium | 200 pm | |
| 92U | Uranium | 196 ±7 pm | |
| 93Np | Neptunium | 190 ±1 pm | |
| 94Pu | Plutonium | 187 ±1 pm | |
| 95Am | Americium | 180 ±6 pm | |
| 96Cm | Curium | 169 ±3 pm | |
| 104Rf | Rutherfordium | (157 pm) | |
| 105Db | Dubnium | (149 pm) | |
| 106Sg | Seaborgium | (143 pm) | |
| 107Bh | Bohrium | (141 pm) | |
| 108Hs | Hassium | (134 pm) | |
| 109Mt | Meitnerium | (129 pm) | |
| 110Ds | Darmstadtium | (128 pm) | |
| 111Rg | Roentgenium | (121 pm) | |
| 112Cn | Copernicium | (122 pm) | |
| 113Nh | Nihonium | (176 ±4 pm) | |
| 114Fl | Flerovium | (174 ±3 pm) | |
| 115Mc | Moscovium | (157 ±1 pm) | |
| 116Lv | Livermorium | (164 ±2 pm) | |
| 117Ts | Tennessine | (156 pm) | |
| 118Og | Oganesson | (157 pm) | |