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 chlorine ion (cl⁻). 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:

1. First, identify the charges of the ions: \( \text{Na}^+ \) is a positive ion, and \( \text{Cl}^- \) is a negative ion.
2. Recall the rule about electric forces between charged objects: Opposite charges attract each other, and like charges repel each other.
3. Since \( \text{Na}^+ \) (positive) and \( \text{Cl}^- \) (negative) have opposite charges, the electric force between them should cause attraction.

Answer:

The electric force causes them to attract.