Input interpretation
promethium | atomic diameter
Result
370 pm (picometers)
Periodic table location
Periodic table location
Atomic radii properties
atomic radius (empirical) | 185 pm atomic radius (calculated) | 205 pm covalent radius | 199 pm
Units
Unit conversions
0.37 nm (nanometers)
3.7×10^-10 meters
1.46×10^-8 inches
3.7 Å (ångströms)
Comparisons as diameter
≈ 0.4 × carbon nanotube diameter ( ≈ 1 nm )
≈ 1.1 × diameter of a carbon atom ( ≈ 340 pm )
≈ (0.00369 to 5) × diameter of a molecule ( 0.74 to 1000 Å )