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atomic radius of alkali metals

Input interpretation

alkali metals | atomic radius
alkali metals | atomic radius

Summary

median | 220 pm highest | 260 pm (cesium) lowest | 145 pm (lithium) distribution | | (based on 5 values; 1 unavailable)
median | 220 pm highest | 260 pm (cesium) lowest | 145 pm (lithium) distribution | | (based on 5 values; 1 unavailable)

Entity with missing value

francium
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
| | 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

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Plot

Periodic table location

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 |
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)
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)
0.22 nm (nanometers)
2.2×10^-10 meters
2.2×10^-10 meters
8.66×10^-9 inches
8.66×10^-9 inches
2.2 Å (ångströms)
2.2 Å (ångströms)

Comparisons for median atomic radius 220 pm

 ≈ 7.1 × atomic radius of helium (the smallest atom) ( ≈ 31 pm )
≈ 7.1 × atomic radius of helium (the smallest atom) ( ≈ 31 pm )
 ≈ 8.8 × atomic radius of hydrogen ( ≈ 25 pm )
≈ 8.8 × atomic radius of hydrogen ( ≈ 25 pm )