Input interpretation
helium | atomic radius
Result
31 pm (picometers)
Periodic table location
Periodic table location
Atomic radii properties
atomic radius (calculated) | 31 pm covalent radius | 28 pm van der Waals radius | 140 pm
Units
Unit conversions
0.031 nm (nanometers)
3.1×10^-11 meters
1.2×10^-9 inches
0.31 Å (ångströms)
Comparisons as atomic radius
≈ atomic radius of helium (the smallest atom) ( ≈ 31 pm )
≈ 1.2 × atomic radius of hydrogen ( ≈ 25 pm )