Input interpretation
poor metals | first ionization energy
Summary
median | 589.4 kJ/mol highest | 715.6 kJ/mol (lead) lowest | 558.3 kJ/mol (indium) | (based on 7 values; 4 unavailable)
Entities with missing values
nihonium | flerovium | moscovium | livermorium (total: 4)
Plot
Plot
Periodic table location
Periodic table location
First ionization energy rankings
1 | indium | 558.3 kJ/mol 2 | aluminum | 577.5 kJ/mol 3 | gallium | 578.8 kJ/mol 4 | thallium | 589.4 kJ/mol 5 | bismuth | 703 kJ/mol 6 | tin | 708.6 kJ/mol 7 | lead | 715.6 kJ/mol (based on 7 values; 4 unavailable)
Unit conversions for median first ionization energy 589.4 kJ/mol
0.5894 MJ/mol (megajoules per mole)
589400 J/mol (joules per mole)
140.9 kcal/mol (thermochemical kilocalories per mole)
6.109 eV (molar electronvolts)
Comparisons for median first ionization energy 589.4 kJ/mol
≈ ( 0.25 ≈ 1/4 ) × molar energy required to remove the first electron from helium ( 2372 kJ/mol )
≈ 1.6 × molar energy required to remove the first electron from cesium ( 377 kJ/mol )