Chemical formula of lithium and chlorine

Lithium will become the cation and chlorine will become the anion. The charges of both ions will both only be one (think of the oxidation numbers!) so you’d simply write this formula as LiCl (Lithium Chloride)

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.