Input interpretation
f-block elements | atomic radius
Summary
median | 180 pm highest | 195 pm (lanthanum and actinium) lowest | 175 pm (10 elements) distribution | | (based on 21 values; 7 unavailable)
Entities with missing values
curium | berkelium | californium | einsteinium | fermium | mendelevium | nobelium (total: 7)
Plot
Plot
Periodic table location
Periodic table location
Atomic radii properties
atomic radius (empirical) | median | 180 pm | highest | 195 pm (lanthanum and actinium) | lowest | 175 pm (10 elements) | distribution | atomic radius (calculated) | median | 226 pm | highest | 247 pm (praseodymium) | lowest | 205 pm (promethium) | distribution | covalent radius | median | 196 pm | highest | 215 pm (actinium) | lowest | 169 pm (curium) | distribution |
Units
Atomic radius rankings
1 | americium | 175 pm 2 | plutonium | 175 pm 3 | neptunium | 175 pm 4 | uranium | 175 pm 5 | ytterbium | 175 pm 6 | thulium | 175 pm 7 | erbium | 175 pm 8 | holmium | 175 pm 9 | dysprosium | 175 pm 10 | terbium | 175 pm ⋮ | | 11 | protactinium | 180 pm 12 | thorium | 180 pm 13 | gadolinium | 180 pm 14 | europium | 185 pm 15 | samarium | 185 pm 16 | promethium | 185 pm 17 | neodymium | 185 pm 18 | praseodymium | 185 pm 19 | cerium | 185 pm 20 | actinium | 195 pm 21 | lanthanum | 195 pm (based on 21 values; 7 unavailable)
Unit conversions for median atomic radius 180 pm
0.18 nm (nanometers)
1.8×10^-10 meters
7.09×10^-9 inches
1.8 Å (ångströms)
Comparisons for median atomic radius 180 pm
≈ 5.8 × atomic radius of helium (the smallest atom) ( ≈ 31 pm )
≈ 7.2 × atomic radius of hydrogen ( ≈ 25 pm )