Answer
Step-by-step explanation
Electrostatic forces are attractive or repulsive forces between particles that are caused by their electric charges. This force is also called the Coulomb force or Coulomb interaction.
When the charges are of the same sign the electrostatic, force is of repulsion; and when the charges are of different sign, the force is of attraction.
Therefore, the ions that would have an electrostatic force of attraction between them will be ⁻