Answer the following question given this paragraph: 

The periodic table is one of the cornerstones of chemistry because it organizes all the known elements on the basis of their chemical properties. A modern version is shown in Figure 2.7 "A Modern Periodic Table". Most periodic tables provide additional data (such as atomic mass) in a box that contains each element’s symbol. The elements are listed in order of atomic number.


Q: The periodic table is one of the cornerstones of chemistry because it organizes all the known elements on the basis of their what?

 Choices:

- size properties

- liquid properties

- acid properties

- chemical properties

A:
chemical properties
