PERIODIC TABLE HISTORY

Father of Modern Chemistry
List 33 chemical elements (Oxygen, Sulfur and Hydrogen)

Who invented Law of Triads?

he had identified ten triads, three groups of four, and one group of five.

describing relationships between various groups of metals.

• Ability of Carbon to bond other 4 elements. (Concept
of Benzene)
• Founder of theory of chemical structure

• Law of Octaves
• Arrange the elements according to atomic number
but slightly differ from modern P.T.

Published periodic table

(Modern Periodic table)

Verticals

Horizontal

# of shells

Same valence, same properties