periodic table
The modern Periodic Table of the Elements is an outgrowth of many older arrangements. The current table takes into account more recent discoveries about the elements and their properties. ... He saw that the intervals occur when the elements are listed in order of increasing atomic weight, recognizing a change in periodic manner. ... The modern Periodic Law states: The properties of the elements are periodic functions of their atomic numbers. ... The change in periodic manner is attributed to the electronic structure of the atom. Because the electronic structures is related to the trend in periodic properties, the periodic table is organized to relate this.