Input interpretation
radium | atomic diameter
Result
430 pm (picometers)
Periodic table location
Periodic table location
Atomic radii properties
atomic radius (empirical) | 215 pm covalent radius | 221 pm
Units
Unit conversions
0.43 nm (nanometers)
4.3×10^-10 meters
1.69×10^-8 inches
4.3 Å (ångströms)
Comparisons as diameter
≈ ( 0.2 ≈ 1/5 ) × DNA helix diameter ( ≈ 2 nm )
≈ 0.4 × carbon nanotube diameter ( ≈ 1 nm )
≈ 1.3 × diameter of a carbon atom ( ≈ 340 pm )