Input interpretation
![alkali metals | first molar ionization energy](../image_source/291577439899562356218390ccc04acb.png)
alkali metals | first molar ionization energy
Summary
![median | 410.9 kJ/mol highest | 520.2 kJ/mol (lithium) lowest | 375.7 kJ/mol (cesium) distribution |](../image_source/026c1cf9b8a947e62a895739b3f0b33d.png)
median | 410.9 kJ/mol highest | 520.2 kJ/mol (lithium) lowest | 375.7 kJ/mol (cesium) distribution |
Units
Ranked values
![| | visual | ratios | 6 | cesium | | 0.722 | 1 5 | francium | | 0.73 | 1.01 4 | rubidium | | 0.775 | 1.073 3 | potassium | | 0.805 | 1.115 2 | sodium | | 0.953 | 1.32 1 | lithium | | 1 | 1.385](../image_source/80065b40a67b5e18e21ab4bafb1b054f.png)
| | visual | ratios | 6 | cesium | | 0.722 | 1 5 | francium | | 0.73 | 1.01 4 | rubidium | | 0.775 | 1.073 3 | potassium | | 0.805 | 1.115 2 | sodium | | 0.953 | 1.32 1 | lithium | | 1 | 1.385
First molar ionization energy rankings
![1 | cesium | 375.7 kJ/mol 2 | francium | 380 kJ/mol 3 | rubidium | 403 kJ/mol 4 | potassium | 418.8 kJ/mol 5 | sodium | 495.8 kJ/mol 6 | lithium | 520.2 kJ/mol](../image_source/57c108149f36d91942d2350aab1cadea.png)
1 | cesium | 375.7 kJ/mol 2 | francium | 380 kJ/mol 3 | rubidium | 403 kJ/mol 4 | potassium | 418.8 kJ/mol 5 | sodium | 495.8 kJ/mol 6 | lithium | 520.2 kJ/mol
Unit conversions for median first molar ionization energy 410.9 kJ/mol
![0.4109 MJ/mol (megajoules per mole)](../image_source/ad72362477ea1319c8becb8a830421df.png)
0.4109 MJ/mol (megajoules per mole)
![410900 J/mol (joules per mole)](../image_source/7b3d80815b8f2107eaa46d4ea9d0a36b.png)
410900 J/mol (joules per mole)
![98.21 kcal/mol (thermochemical kilocalories per mole)](../image_source/a8dc38bfda9ed91f702f7f01316312a5.png)
98.21 kcal/mol (thermochemical kilocalories per mole)
![98210 cal/mol (calories per mole)](../image_source/f2dbb01d22d3db7c1d5a932603e707c6.png)
98210 cal/mol (calories per mole)
![4.259 eV (molar electronvolts)](../image_source/1dbfb47d5951565e5bb00f11c42d2454.png)
4.259 eV (molar electronvolts)
Comparisons for median first molar ionization energy 410.9 kJ/mol
![≈ ( 0.17 ≈ 1/6 ) × molar energy required to remove the first electron from helium ( 2372 kJ/mol )](../image_source/eafb7d98c7dd00921068fd60abb157dc.png)
≈ ( 0.17 ≈ 1/6 ) × molar energy required to remove the first electron from helium ( 2372 kJ/mol )
![≈ 1.1 × molar energy required to remove the first electron from cesium ( 377 kJ/mol )](../image_source/4a10c01ad72b81052c80c7b1e08d76f6.png)
≈ 1.1 × molar energy required to remove the first electron from cesium ( 377 kJ/mol )