Which statement is true? 1. The electronegativity of an atom depends only on the value of the ionization energy of the atom. 2. Atoms with high ionization energies and high electron affinities are highly electronegative. 3. Atoms with low ionization energies and low electron affinities have high electronegativities. 4. The electronegativity of an atom is defined as 1 2 (Electron Affinity) of the atom. 5. Atoms with high ionization energies and high electron affinities have low electronegativities.