Question

which of the following correctly indicates whether the solid represented by the particulate model shown above conducts electricity and explains why or why not? a it conducts electricity because it is made of positive and negative ions. b it conducts electricity because it is made of particles of different sizes. c it does not conduct electricity because its ions cannot move freely within the solid. d it does not conduct electricity because there are small spaces between the particles.

Explanation:

For a solid to conduct electricity, charged - particles (ions or electrons) must be able to move freely. In the given ionic - solid model, the ions are in fixed positions and cannot move freely within the solid. Options A and B are incorrect because just having positive and negative ions or particles of different sizes is not sufficient for electrical conductivity in a solid. Option D is incorrect as the small spaces between particles are not the determining factor for electrical conductivity. The key factor is the mobility of charged particles.

Answer:

C. It does not conduct electricity because its ions cannot move freely within the solid.