Which answer choice correctly describes why metals are good conductors of thermal energy? Their atoms have free-floating electrons that easily pass kinetic energy throughout the metal.
Their atoms have free-floating electrons that easily pass kinetic energy throughout the metal., ,

The space between the metal atoms is narrow and keeps kinetic energy from being lost to the environment.
The space between the metal atoms is narrow and keeps kinetic energy from being lost to the environment., ,

The space between their atoms is wide and enables kinetic energy to easily flow though the metal.
The space between their atoms is wide and enables kinetic energy to easily flow though the metal.

Their atoms have rigid electrons that keep the negative charge of the metal constant.