Input interpretation
helium cation | ion class
Result
cations | group 18 ions | noble gas ions | p block ions | ionic radioactive particles
Ionic radii
| 2-coordinate | 4-coordinate cations | 57.5 pm (median) 46 pm (copper(I) cation) (lowest) 69 pm (mercury(II) cation) (highest) | 61.5 pm (median) 39 pm (aluminum cation) (lowest) 137 pm (potassium cation) (highest) p block ions | 121 pm (median) 121 pm (oxide anion) (lowest) 121 pm (oxide anion) (highest) | 51 pm (median) 34 pm (arsenic(V) cation) (lowest) 76 pm (antimony(III) cation) (highest) | 5-coordinate | 6-coordinate cations | 48 pm (median) 48 pm (aluminum cation) (lowest) 48 pm (aluminum cation) (highest) | 73 pm (median) 54 pm (aluminum cation) (lowest) 138 pm (potassium cation) (highest) p block ions | 48 pm (median) 48 pm (aluminum cation) (lowest) 48 pm (aluminum cation) (highest) | 99 pm (median) 46 pm (arsenic(V) cation) (lowest) 220 pm (iodide anion) (highest) | 8-coordinate | 9-coordinate | 10-coordinate cations | 112 pm (median) 78 pm (iron(III) cation) (lowest) 151 pm (potassium cation) (highest) | 124 pm (median) 124 pm (sodium cation) (lowest) 124 pm (sodium cation) (highest) | 131.5 pm (median) 123 pm (calcium cation) (lowest) 140 pm (lead(II) cation) (highest) p block ions | 111.5 pm (median) 81 pm (tin(IV) cation) (lowest) 142 pm (oxide anion) (highest) | | | 12-coordinate | thermochemical radius cations | 144 pm (median) 134 pm (calcium cation) (lowest) 164 pm (potassium cation) (highest) | 137 pm (median) 137 pm (ammonium cation) (lowest) 137 pm (ammonium cation) (highest)