All gases are grouped together. Gases easily form compounds with other elements. Elements within a group have similar properties. Elements within a period have the same number of electrons.
Which statement best describes the organization of the Periodic Table of the Elements?

Options:
- All gases are grouped together.
- Gases easily form compounds with other elements.
- Elements within a group have similar properties.
- Elements within a period have the same number of electrons.

Elements within a group have similar properties.