Final answer:
The periodic table is a useful tool in chemistry that helps us understand how the properties of elements vary. It allows us to determine periodic trends and understand properties such as atomic radius, ionization energies, and electron affinities.
Step-by-step explanation:
The periodic table is a useful tool in chemistry because it allows us to determine how the properties of elements vary based on their position on the table.
These variations are called periodic trends.
The periodic table helps us understand properties such as atomic radius, ionization energies, and electron affinities.