Input interpretation
period 3 elements | atomic radius
Summary
median | 105 pm highest | 180 pm (sodium) lowest | 71 pm (argon) distribution |
Units
Ranked values
| | visual | ratios | 8 | argon | | 0.39 | 1 7 | phosphorus | | 0.56 | 1.4 6 | sulfur | | 0.56 | 1.4 5 | chlorine | | 0.56 | 1.4 4 | silicon | | 0.61 | 1.5 3 | aluminum | | 0.69 | 1.8 2 | magnesium | | 0.83 | 2.1 1 | sodium | | 1 | 2.5
Plot
Plot
Periodic table location
Periodic table location
Atomic radii properties
atomic radius (empirical) | median | 110 pm | highest | 180 pm (sodium) | lowest | 100 pm (3 elements) | distribution | atomic radius (calculated) | median | 105 pm | highest | 190 pm (sodium) | lowest | 71 pm (argon) | distribution | covalent radius | median | 109 pm | highest | 166 pm (sodium) | lowest | 102 pm (chlorine) | distribution | van der Waals radius | median | 180 pm | highest | 227 pm (sodium) | lowest | 173 pm (magnesium) | distribution |
Units
Atomic radius rankings
1 | argon | 71 pm 2 | chlorine | 100 pm 3 | sulfur | 100 pm 4 | phosphorus | 100 pm 5 | silicon | 110 pm 6 | aluminum | 125 pm 7 | magnesium | 150 pm 8 | sodium | 180 pm
Unit conversions for median atomic radius 105 pm
0.105 nm (nanometers)
1.05×10^-10 meters
4.13×10^-9 inches
1.05 Å (ångströms)
Comparisons for median atomic radius 105 pm
≈ 3.4 × atomic radius of helium (the smallest atom) ( ≈ 31 pm )
≈ 4.2 × atomic radius of hydrogen ( ≈ 25 pm )