That would be the symmetric property. Hope I helped :)
Answer:
Answer is 8 units
Step-by-step explanation:
First option ,, it will be the first option
I think the best property to use is electronegativity since that is how much it attracts/wants electrons. The larger the difference in electronegativity is between two atoms, the stronger the ionic bond will be. This is also why two atoms need to have a minimum difference between the electronegativity to be considered ionic and not covalent.