Question

a charged object, like an ion, can exert an electric force on another object. if two objects have opposite charges, they attract each other. if two objects have the same charge, they repel each other. the model below shows a positive sodium ion (na⁺) and a negative chloride ion (cl⁻). image of sodium ion and chloride ion structure which sentence describes the electric force between na⁺ and cl⁻? the electric force causes them to attract. the electric force causes them to repel. there is no electric force between them.

Explanation:

The problem states that opposite - charged objects attract each other. A sodium ion ($\text{Na}^+$) is positive and a chloride ion ($\text{Cl}^-$) is negative, so they have opposite charges. According to the rule of electric force between charged objects, opposite - charged objects attract. So the electric force between $\text{Na}^+$ and $\text{Cl}^-$ causes them to attract.

Answer:

The electric force causes them to attract.