-
340
Aristotle
Stated that matter was made of elements. -
460
Democritus
Formulated theory called atomist. This stated that everyting was made of atoms. -
Antonie Lavosier
He discovered that even though mass changes form or shape it always stays the same. -
John Dalton
Chemist known for developing the ancient concept of atoms into a scientific theory that has become a foundation of modern chemistry. -
Amedeo Avogadro
He created Avogadro's Law. The law states that the relationship between the masses of the same volume of different gases corresponds to the relationship between their respective molecular weights. -
Joseph proust
Was known to have helped prove the idea that every pure hemical compound consist of elements in definite proportion. -
When Iowa became a State
-
J.J. Thomson
Man that had dscovered the electron. -
William Crooks
Was famous for discovering Phalium. -
Death of Abe Lincoln
16th President -
Albert Einstein
Most famous for creating the general theory of relativity. -
First lgiht bulb
Thomas Edison made first light bulb. -
Henry Moseley
Created Moseley's law which justified many concepts in chemistry by sorting the chemical elements on the periodic in a order based on their physics. -
Henri Becquerel
Was known for discovering radioactivity. -
Madame Curie
Known for discovering Radium and Polonium. -
Werner Heisenberg
He was one of the key creators of the quantum michanics. The quantum michanics is a branch of physics which deals with physical phenomena at microscopic scales. -
First flight
Wright Brother created first flight -
Robert Millkan
Discovered the changes in mass and electrons. -
Titanic sank
This is when Titanic hit ice and sank. -
Niels Bohr
He developed the Bohr model of the atom in which he proposed that energy levels of electrons are discrete and that the electrons revolve around the atomic nucleus but can jump from one energy level or orbit to another. -
Ernest Rutherford
First person to split in atom. -
Max Planck
Was the founder of the quantum theory. -
Erwin Shrodinger
Was the founder of the elecron cloud model theory. -
James Chadwick
Was famous for discovering the nuetron. -
Death of JFK
35th President -
First person on the moon
Neil Armstrong made first step on the moon. -
Space shuttle Challanger blew up
Blew up 73 sec after launch. -
My Birthday
-
911
Terrorist bombedWorld trade center -
First Automobile Invented
First working steam powered engine was created by Carl Benz.
