Question

what is ionic crystal and write its properties

Answer 1

Ionic Crystals :-

When the lattice point in crystal are alternatively occupied by oppositely charged ions and held Together by electrostatic force then such crystals are called ionic crystals .

Properties :-

➡️The ionic crystals are very hard and brittle .

➡️They have very high melting point and boiling point .

➡️They have high heat of vaporization .

Answer 2

★ Answer :

Lattice defects in ionic crystals are interstitial ions and ion vacancies. In crystalline sodium chloride NaCl a cation vacancy $\sf{VNa^{+}}$ is formed. Ionic crystals have at least two atoms in their base which are ionized. Charge neutrality demands that the total charge in the base must be ionized.

$\rule{200}{2}$

★ Properties :

• Ionic crystals are hard

• They have high melting points

• They are brittle.

• They have higher enthalpies of fusion and vaporization than molecular compounds.

• They conduct electricity but only when they are dissolved in water.