Physical chemistry is that the study of macroscopic, and particulate phenomena in chemical systems in terms of the principles, practices, and ideas of physics like motion, energy, force, time, thermodynamics, quantum chemistry, physics, analytical dynamics and equilibrium. Chemistry, in contrast to chemical physics, is predominantly (but not always) a macroscopic or supra-molecular science, because the majority of the principles on which it had been founded relate to the majority instead of the molecular/atomic structure alone (for example, equilibrium and colloids). Physical chemists predict properties and reactions of chemicals, then test and refine those predications. They use mathematical analysis and statistics on huge datasets, sometimes with many data points, to reveal hidden information about compounds, materials, and processes.