Mendeleev's Periodic Table

Dmitri Mendeleev's Periodic Table organized elements based on increasing atomic weight and similar chemical properties into rows and columns. He predicted the existence and properties of undiscovered elements by leaving gaps, showing a periodic pattern. This arrangement revealed that elements with similar traits repeat periodically, forming the foundation for our modern understanding of elemental relationships and chemical behavior. Mendeleev's table was a crucial step toward the development of the periodic law, emphasizing the recurring nature of elemental properties in a structured, logical table.