Input interpretation
period 7 elements | atomic radius
Summary
median | 178 pm highest | 215 pm (radium) lowest | 175 pm (4 elements) distribution | | (based on 8 values; 24 unavailable)
Entities with missing values
francium | berkelium | curium | californium | einsteinium | fermium | mendelevium | nobelium | rutherfordium | dubnium | ... (total: 24)
Plot
Plot
Periodic table location
Periodic table location
Atomic radii properties
atomic radius (empirical) | median | 178 pm | highest | 215 pm (radium) | lowest | 175 pm (4 elements) | distribution | covalent radius | median | 198 pm | highest | 260 pm (francium) | lowest | 169 pm (curium) | distribution |
Units
Atomic radius rankings
1 | plutonium | 175 pm 2 | americium | 175 pm 3 | uranium | 175 pm 4 | neptunium | 175 pm 5 | thorium | 180 pm 6 | protactinium | 180 pm 7 | actinium | 195 pm 8 | radium | 215 pm (based on 8 values; 24 unavailable)
Unit conversions for median atomic radius 178 pm
0.178 nm (nanometers)
1.78×10^-10 meters
6.99×10^-9 inches
1.78 Å (ångströms)
Comparisons for median atomic radius 178 pm
≈ 5.7 × atomic radius of helium (the smallest atom) ( ≈ 31 pm )
≈ 7.1 × atomic radius of hydrogen ( ≈ 25 pm )