Electronegativity and first ionization energy both increase going up the Periodic Table.
Helium has the highest ionization energy due to its stable electron configuration, requiring a lot of energy to remove an electron. In contrast, francium has the lowest ionization energy because it is the least electronegative element and its outer electron is the furthest from the nucleus, making it easier to remove.
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.