Chemistry

Events

First Chemistry Book

1789

Lavoisier wrote the first ever chemistry textbook called the Elementary Treatise of Chemistry. The book contained a list of elements, the most recent theories and laws of chemistry including the Conservation of Mass.

Law of Triads

1817

Groups of three elements could be grouped together based off of appearance and properties.

Atomic Mass

1837

John Newlands was the first scientist to propose a periodic table organised by atomic mass.

Law of octaves

1864

John Newlands proposed the law of octaves which stated that any element will act similarly to the element eight places after it.

Meyer

1864 - 1870

Meyer wrote a book illustrating the fundamental aspects of chemistry, called Die modernen Theorien der Chemie (or Modern Chemical Theory) in 1864. Meyer began working on a Periodic Table in 1868, and he released his research in 1870.

Properties

1869

Dimitri Mendeleev published a periodic table that allowed known elements to be grouped according to their properties and atomic weight.

Plutonium

1940

Plutonium is a radioactive element which first found in 1940 by Glenn Seaborg and his team Arthur Wahl, Joseph Kennedy, and Edwin McMillan.