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 |
|---|---|---|---|---|---|---|---|
| 12 | Mg | magnesium | 150 | 145 | 173 | 130 | 127 |
| 13 | Al | aluminium | 125 | 118 | 184 a | 118 | 111 |
| 14 | Si | silicon | 110 | 111 | 210 | 111 | 102 |
| 15 | P | phosphorus | 100 | 98 | 180 | 106 | 94 |
| 16 | S | sulfur | 100 | 88 | 180 | 102 | 95 |
| 17 | Cl | chlorine | 100 | 79 | 175 | 99 | 93 |
| 18 | Ar | argon | 71 | 71 | 188 | 97 | 96 |
| 19 | K | potassium | 220 | 243 | 275 | 196 | no data |
| 20 | Ca | calcium | 180 | 194 | 231 a | 174 | 133 |
| 21 | Sc | scandium | 160 | 184 | 211 a | 144 | 114 |
| 22 | Ti | titanium | 140 | 176 | no data | 136 | 108 |
| 23 | V | vanadium | 135 | 171 | no data | 125 | 106 |