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Moderate

The Physical Properties of Solids

APCHEM-NE7CKX

Solids are generally divided into types: ionic, metallic, amorphous, molecular, and covalent network. Categorization is based largely on the physical properties of the substances involved.

Examine the properties of the four solids, A, B, C, and D, as described in the table below.

Substance Melting Point Water Soluble? Electrical Conductor?
A >3800ºC No No
B >3500 ºC No Yes
C 2230 ºC No No
D 2700 ºC No No

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Which of the following is the MOST likely category for these four solids?

A

Ionic crystalline.

B

Covalent network.

C

Metallic.

D

Molecular.