The Periodic Table: Classifying Elements

The video discusses the challenges faced by scientists in the 1800s due to the lack of a systematic way to classify elements. Dmitry Mendeleev's attempt to organize elements by atomic mass laid the groundwork for the modern periodic table. Henry Mosley's work on atomic numbers further refined this system, leading to the periodic law that defines today's table, where elements' properties are periodic functions of their atomic numbers.

What significant contribution did Henry Mosley make to the periodic table?

What does the periodic law state about the properties of elements?