(I will give a Brainliest) How would you describe the change in the arrangement of particles as heat energy and
temperature increase?

The particles would be more scattered out as those three factors increase.

With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion. ... With an increase in temperature, the particles gain kinetic energy and vibrate faster and more strongly

Ametal with a large number of free flowing electrons most likely has good conductivity