Ionic compounds are held together by the electrostatic attraction between cation

Question

Ionic compounds are held together by the electrostatic attraction between cations and anions called ionic bonds. Which statement is correct considering ionic compounds?

Ionic compounds are held together by the electrostatic attraction between cations and anions called ionic bonds. Which statement is correct considering ionic compounds?

The strength of the interactions between cations and anions increase as the charges on the ions decrease. Ionic compounds have low boiling points. The strength of the interactions between cations and anions increase as ions get larger. Ionic compounds have high melting points.

Explanation / Answer

1. charge(z): Higher the charge of the ions stronger the interaction

2. Size of the ion(r): Smaller the size of the ions stronger the interaction.

strength of the interactions (z/r).....[z/r is called charge density]

So neither first or third statement is correct.

Ionic compounds form crystals. To separate the ions from the lattice network requires very high energy. So ionic compounds have high boiling and melting points.

So fourth statement is correct.

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