Atomic radii of the elements (data page) Atomic radii Atomic radii

| number_ | symbol | name_ | empirical_ | Calculated | van_der_Waals | Covalent_single_bond | Covalent_triple_bond |
|---|---|---|---|---|---|---|---|
| 82 | Pb | lead | 180 | 154 | 202 | 147 | 137 |
| 83 | Bi | bismuth | 160 | 143 | 207 a | 146 | 135 |
| 84 | Po | polonium | 190 | 135 | 197 a | no data | 129 |
| 85 | At | astatine | no data | no data | 202 a | no data | 138 |
| 86 | Rn | radon | no data | 120 | 220 a | 145 | 133 |
| 87 | Fr | francium | no data | no data | 348 a | no data | no data |
| 88 | Ra | radium | 215 | no data | 283 a | no data | 159 |
| 89 | Ac | actinium | 195 | no data | no data | no data | 140 |
| 90 | Th | thorium | 180 | no data | no data | no data | 136 |
| 91 | Pa | protactinium | 180 | no data | no data | no data | 129 |