Jill then wrote the formulas for all the possible compounds that sodium can form with the other ions. what formulas did she write?

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

c. electrical charges of ionic bonds.