What type of bond is formed when a "sea of electrons" move freely among tightly packed cations

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.