Condition stops when all substances have

Equal temperatures.

Heat energy can be transferred from one place to another by three main processes. In convection, heat energy is carried by the movement of particles of matter. In conduction, heat is transferred by particles vibrating. In radiation, heat is carried directly by electromagnetic waves. During conduction heat travels through solids by conduction. If one end of a metal bar is heated, heat energy moves rapidly along the bar. The hot particles do not move along the bar, but vibrate and pass energy to their neighbors.

Hope it helps! :D

number of electrons for neutral cl