mercury is made of mercury atoms & atom is a kind of particle ->  mercury is made of atom particles  mercury is made of atom particles & particles in a solid are closer together than particles in a liquid & mercury changes from liquid state to solid state ->  mercury atoms move closer together  mercury is made of mercury atoms & atom is a kind of particle ->  mercury is made of atom particles  mercury is made of atom particles & particles in a liquid have more kinetic energy than particles in a solid & mercury changes from liquid state to solid state ->  mercury atoms have less kinetic energy  mercury atoms move closer together & mercury atoms have less kinetic energy -> mercury atoms have less kinetic energy and move closer together