What are the first two ionization energies of nickel?

The first ionization energy of nickel (Ni) is approximately 737.2 kJ/mol, while the second ionization energy is around 1752.5 kJ/mol. The first ionization energy refers to the energy required to remove the outermost electron, and the second ionization energy is the energy needed to remove a second electron after the first has been removed. These values reflect the increasing difficulty of removing electrons as the positive charge of the ion increases.