Input interpretation
group 8 elements | first ionization energy
Results
iron | 762.5 kJ/mol (kilojoules per mole) ruthenium | 710.2 kJ/mol (kilojoules per mole) osmium | 840 kJ/mol (kilojoules per mole) hassium | (data not available)
group 8 elements | first ionization energy | 762.5 kJ/mol (kilojoules per mole) (median) (based on 3 values; 1 unavailable)
Ranked values
| | visual | ratios | 3 | ruthenium | | 0.845 | 1 2 | iron | | 0.908 | 1.074 1 | osmium | | 1 | 1.18
Plot
Plot
Periodic table location
Periodic table location
Unit conversions for median first ionization energy 762.5 kJ/mol
0.7625 MJ/mol (megajoules per mole)
762500 J/mol (joules per mole)
182.2 kcal/mol (thermochemical kilocalories per mole)
7.903 eV (molar electronvolts)
Comparisons for median first ionization energy 762.5 kJ/mol
≈ 0.32 × molar energy required to remove the first electron from helium ( 2372 kJ/mol )
≈ 2 × molar energy required to remove the first electron from cesium ( 377 kJ/mol )