Answer the following question given this paragraph: 

Physical chemistry is the study of macroscopic properties, atomic properties, and phenomena in chemical systems. A physical chemist may study such things as the rates of chemical reactions, the energy transfers that occur in reactions, or the physical structure of materials at the molecular level.


Q: What is the study of macroscopic properties, atomic properties, and phenomena in chemical systems?

 Choices:

- differential chemistry

- thermal chemistry

- molecular chemistry

- physical chemistry

A:
physical chemistry
