Sodium's first ionization energy is 495 kJ / mol.
Helium has the highest ionization energy.
The first ionization energy is 1681 kJ/mol.
Fluorine has the largest first ionization energy among the halogens.
Fluorine has the largest first ionization energy among the halogens.
ionization potential energy. but remember the atom must be neutral .
Across a row on the periodic table ionization energy increases. Down a column, ionization energy decreases. --------------------------------------------------------- The first Ionization energy of Boron is 800.6 kJ mol-1
The ionization energy (first) of einsteinium is 619 kJ/mol.
The first ionization energy for carbon is 1 086,5 kJ/mol. The first ionization energy for oxygen is 1 319,9 kJ/mol.
The estimated first ionization energy of mendelevium is 635 kJ/mol.
The estimated first ionization energy of rutherfordium is 579,9 kJ/mol.
Barium has more energy levels. So it has lesser ionization energy.
When electronegativity decrease the first ionization energy also decrease.