The marbles can be pushed anywhere within the box and the water will follow them, always surrounding the marbles. Because of this unique property, metallic bonds can maintain their existence when pushed and pulled in all sorts of ways. If a metal is subjected to a force, the kernels can slide around on the layer of electrons. As the kernels move to new positions, the bonds will not break, because of their omnidirectional nature. In addition to being malleable and ductile, they are also very good conductors of electricity.
Electricity depends upon the flow of electrons.
Whenever electrons can flow easily through a structure, then that structure is said to be a good electrical conductor. Clearly, the very fluid nature of the electron sea allows it to be a very good electrical conductor. Because of this quality, metals are usually used in the electronics industry. Metals are also known as being good conductors of heat, or thermal conductors. Heat is kinetic energy.