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Ionic compounds typically form giant three-dimensional structures known as:

Ionic crystals.

Polymer chains.

Simple molecules.

Metallic lattices.

The shape of carbon dioxide (CO₂) molecule is:

Pyramidal.

Tetrahedral.

Linear.

Bent or V-shaped.

The H-O-H bond angle in water is:

104.5^o.

109.5^o.

107^o.

180^o.

Which of the following compounds would you expect to have the highest melting point?

NaCl (Sodium Chloride).

Cl₂(Chlorine gas).

CH₄(Methane).

H₂O (Water).

Crystals of iodine and dry ice easily sublime because with a little heat applied the:

Weak van der waal’s forces between their molecules are overcome.

Weak hydrogen bonds between their molecules are overcome.

Weak covalent forces between their molecules are overcome.

Weak ionic forces between their molecules are overcome.