Input interpretation
alkali metals | atomic radius
Summary
median | 220 pm highest | 260 pm (cesium) lowest | 145 pm (lithium) distribution | | (based on 5 values; 1 unavailable)
Entity with missing value
francium
Ranked values
| | visual | ratios | 5 | lithium | | 0.56 | 1 4 | sodium | | 0.69 | 1.24 3 | potassium | | 0.85 | 1.52 2 | rubidium | | 0.9 | 1.62 1 | cesium | | 1 | 1.79
Plot
Plot
Periodic table location
Periodic table location
Atomic radii properties
atomic radius (empirical) | median | 220 pm | highest | 260 pm (cesium) | lowest | 145 pm (lithium) | distribution | atomic radius (calculated) | median | 243 pm | highest | 298 pm (cesium) | lowest | 167 pm (lithium) | distribution | covalent radius | median | 212 pm | highest | 260 pm (francium) | lowest | 128 pm (lithium) | distribution | van der Waals radius | median | 227 pm | highest | 275 pm (potassium) | lowest | 182 pm (lithium) | distribution |
Units
Atomic radius rankings
1 | lithium | 145 pm 2 | sodium | 180 pm 3 | potassium | 220 pm 4 | rubidium | 235 pm 5 | cesium | 260 pm (based on 5 values; 1 unavailable)
Unit conversions for median atomic radius 220 pm
0.22 nm (nanometers)
2.2×10^-10 meters
8.66×10^-9 inches
2.2 Å (ångströms)
Comparisons for median atomic radius 220 pm
≈ 7.1 × atomic radius of helium (the smallest atom) ( ≈ 31 pm )
≈ 8.8 × atomic radius of hydrogen ( ≈ 25 pm )