When a solid is heated, what happens to the molecules? a. The molecular attractions between molecules increase until they are a solid rigid shape.
b. The molecules start to change shape immediately and are destroyed by the heat.
c. The molecules start bouncing around faster and faster, causing more frequent collisions.
d. The molecules repel each other more and push away from each other until they are no longer together.
e. The molecules vibrate faster and faster until their attractive forces are broken by their movement.

Option C - The molecules start bouncing around faster and faster, causing more frequent collisions.

Explanation:

When a solid is heated the particles gain energy and start to vibrate faster and faster. Further heating provides more energy until the particles start to break free of the structure.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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