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490 BCE
Democritus
He's the one who formulated the atomic theory -
340 BCE
Aristotle
He challenged the idea of the atom, stating that everything on earthwas made of either earth, water, fire, or air -
John Dalton
Contributed the Atomic Theory, which stated that 1. All matter is made of atoms 2. All atoms of a given element are identicle in given mass and form. 3. Compounds are formed by two or more different types of atoms 4. A chemical reaction is a rearangement of atoms -
Antonie Lavosier
Is a french chemist that stated that matter is neither created nor destroyed in a chemical reaction -
Joseph Proust
He founded the Law Of Definite Proportions. -
Amadeo Avagadro
The hypothesis states that at the same temperature and pressure, equal volumes of gases contain the same number of molecules or atoms -
American Civil war
The South seperated from the Union starting the American Civil War -
Henri Becquerel
He discovered radioactivity while messing with uranium -
William Crookes
Is the person who discovered the element thallium -
J.J. Thomson
Along with William Crookes, J.J. Thompson discovered the electron -
Albert Einstein
He made the theory of relativity which states that matter when moving fast enough can turn into energy -
Madame Curie
Discovered that an elements radioactive ablilities did not matter on the order of the atoms, but the atoms nature itself -
Henry Moseley
Developed the atomic number -
Robert Millikan
He is the man who designed the oil drop experiment to measure electrons in a given substance -
Ernest Rutherford
Developed the gold foil experiement which showed that you could probe an atom because it had such a heavy nucleus with radioactivity. -
Max Planck
Developed the quantum theory of energy -
Niels Bohr
Developed the hydrogen atom based on the quantum theory -
Erwin Schrodinger
Is the person who modern model for the atom Is ther person who modern model for the atom -
Louis deBroglie
French physicist best known for his research on quantum theory and for predicting the wave nature of electrons. He was awarded the 1929 Nobel Prize for Physics. -
Werner Heisenberg
Werner Heisenberg contributed to the atomic theory by including quantum mechanics, the branch of mechanics, based on quantum theory, used for interpretating the behavior of elementary particles and atoms. -
James Chadwick
Discovered the nuetron -
WWII
Hitler raised the nazi armies to exterminate the jews and try and bring forth his ideals towards other nations. (Video) https://www.youtube.com/watch?v=ewGxnX82WVo -
JFK was shot
JFK was show in Dallas Texas (Video) https://www.youtube.com/watch?v=uw0CHiPpy0o -
O.J. Simpson trial
OJ simpson was put on trial for the brutal murder of his wife (Video) https://www.youtube.com/watch?v=D41QVKzn_wk -
911
Al qaeda terrorist ran planes into the world trade centers (Video)https://www.youtube.com/watch?v=SZH7KNkSqGk -
Barack Obama elected president
Our first African american president was elected -
Sandy Hooke
A man entered Sandy Hooke and opened fire on children and teachers attending school -
Robin Williams death
Robin Williams committed suicide in his apartment -
Bill Cosby Stands trial
Bill Cosby stood trial for the sexual assualt of multipul women -
Donald J. Trump is the republican nominee
Donald trump convinced enough of the American people to vote for him. Even though he is completely unqualified to be president
