Input interpretation
period 3 elements | first ionization energy
Summary
median | 893.1 kJ/mol highest | 1520.6 kJ/mol (argon) lowest | 495.8 kJ/mol (sodium) distribution |
Units
Ranked values
| | visual | ratios | 8 | sodium | | 0.3261 | 1 7 | aluminum | | 0.3798 | 1.165 6 | magnesium | | 0.4851 | 1.488 5 | silicon | | 0.5172 | 1.586 4 | sulfur | | 0.6574 | 2.016 3 | phosphorus | | 0.6654 | 2.041 2 | chlorine | | 0.8228 | 2.524 1 | argon | | 1 | 3.067
Plot
Plot
Periodic table location
Periodic table location
First ionization energy rankings
1 | sodium | 495.8 kJ/mol 2 | aluminum | 577.5 kJ/mol 3 | magnesium | 737.7 kJ/mol 4 | silicon | 786.5 kJ/mol 5 | sulfur | 999.6 kJ/mol 6 | phosphorus | 1011.8 kJ/mol 7 | chlorine | 1251.2 kJ/mol 8 | argon | 1520.6 kJ/mol
Unit conversions for median first ionization energy 893.1 kJ/mol
0.8931 MJ/mol (megajoules per mole)
893100 J/mol (joules per mole)
213.4 kcal/mol (thermochemical kilocalories per mole)
9.256 eV (molar electronvolts)
Comparisons for median first ionization energy 893.1 kJ/mol
≈ 0.38 × molar energy required to remove the first electron from helium ( 2372 kJ/mol )
≈ 2.4 × molar energy required to remove the first electron from cesium ( 377 kJ/mol )