Input interpretation
period 1 elements | atomic volume
Results
hydrogen | 70000 pm^3 (cubic picometers) helium | 120000 pm^3 (cubic picometers)
period 1 elements | atomic volume | 100000 pm^3 (cubic picometers) (median)
Relative values
| visual | ratios | | comparisons hydrogen | | 0.5 | 1 | 50% smaller helium | | 1 | 2 | 90% larger
Plot
Plot
Periodic table location
Periodic table location
Atomic radii properties
| hydrogen | helium atomic radius (empirical) | 25 pm | atomic radius (calculated) | 53 pm | 31 pm covalent radius | 31 pm | 28 pm van der Waals radius | 120 pm | 140 pm
Units
Unit conversions for median atomic volume 100000 pm^3
≈ 1×10^-31 m^3 (cubic meters)
≈ 1×10^-28 L (liters)
≈ 3×10^-30 ft^3 (cubic feet)
Comparisons for median atomic volume 100000 pm^3
≈ 0.64 × Rydberg volume ( ≈ 1.5×10^-31 m^3 )
≈ 0.76 × volume of a helium atom ( 4 Pi/3 atomic radii of helium (the smallest atom)^3 )
≈ 1.5 × volume of a hydrogen atom ( 4 Pi/3 atomic radii of hydrogen^3 )
Corresponding quantities
Radius r of a sphere from V = 4πr^3/3: | 28 pm (picometers) | 1.1×10^-9 inches
Edge length a of a cube from V = a^3: | 46 pm (picometers) | 1.8×10^-9 inches