Respuesta :

Amorphous solids
Crystalline solids
Polycrystalline solids

Answer:

Physical solids- (3 properties); Density, melting point, magnetism.

Mechanical solids- ( 4 properties); elasticity, hardness, tensile strength, toughness.

Thermal solids- (2 properties); conductivity, expansion.

Electric solids- (2 properties); conductivity or insulative capacity.

Acoustics solids- (2 properties); compression, shear, and pressure wave velocities.

Explanation: