Input interpretation
s-block elements | atomic diameter
Summary
median | 360 pm highest | 520 pm (cesium) lowest | 50 pm (hydrogen) distribution | | (based on 13 values; 1 unavailable)
Entity with missing value
francium
Plot
Plot
Periodic table location
Periodic table location
Atomic radii properties
atomic radius (empirical) | median | 190 pm | highest | 260 pm (cesium) | lowest | 25 pm (hydrogen) | distribution | atomic radius (calculated) | median | 192 pm | highest | 298 pm (cesium) | lowest | 31 pm (helium) | distribution | covalent radius | median | 186 pm | highest | 260 pm (francium) | lowest | 28 pm (helium) | distribution | van der Waals radius | median | 178 pm | highest | 275 pm (potassium) | lowest | 120 pm (hydrogen) | distribution |
Units
Distribution plots
(atomic diameter in picometers)
Atomic diameter rankings
1 | hydrogen | 50 pm 2 | helium | 62 pm 3 | beryllium | 210 pm 4 | lithium | 290 pm 5 | magnesium | 300 pm 6 | calcium | 360 pm 7 | sodium | 360 pm 8 | strontium | 400 pm 9 | radium | 430 pm 10 | barium | 430 pm 11 | potassium | 440 pm 12 | rubidium | 470 pm 13 | cesium | 520 pm (based on 13 values; 1 unavailable)
Unit conversions for median atomic diameter 360 pm
0.36 nm (nanometers)
3.6×10^-10 meters
1.42×10^-8 inches
3.6 Å (ångströms)
Comparisons for median atomic diameter 360 pm
≈ 0.4 × carbon nanotube diameter ( ≈ 1 nm )
≈ 1.1 × diameter of a carbon atom ( ≈ 340 pm )
≈ (0.00359 to 4.8) × diameter of a molecule ( 0.74 to 1000 Å )