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1601 BCE
The Alchemists
Alchemy first fully began in the 17th century -
460 BCE
Democritus
he theorized that all matter has atoms in them even though there technology was not good for that time line -
428 BCE
Plato
he was a Greek philosopher he founded the platonist school -
384 BCE
Aristotle
Aristotle was a Greek philosopher and polymath during the Classical period in Ancient Greece -
Lavoisier
he thought that matter will nether create nor destroy -
John Dalton
he proposed that ever element is the same for example they weigh the same -
Newton's Law of Octaves
A British chemist named John Newlands attempted to combine the 62 elements known at the time in 1864. and then put them in order by there atomic mass -
Mendeleev's Pd. table
he created the frame work for the first Pd table -
Photoelectric Effect
In connection with work on radio waves, Hertz observed that, when ultraviolet light shines on two metal electrodes with a voltage applied across them -
Discovery of Radioactivity
Henri Becquerel he is well know for the accidental discovers ever -
Discovery of the Electron
searched cathode rays for the carrier of the electrical properties in matter -
Change of the Electron
it was discovered by a English physicist named J.J. Thomas -
Planck's Quantum Theory of Light
his theory tell us light bulb filaments should be heated to a temperature about 3200 Kelvin to have the most energy shown -
Plum Pudding Model
all of the experimental evidence about atoms in the simplest way possible -
Discovery of the Proton
Ernest Rutherford he named the discovery "proton" because of the Greek word "protons" -
Rutherford's Gold Foil Experiment
if you bombarded very thin sheets of gold foil with fast moving alpha particles -
Bohr's Planetary Modle
Niels Bohr had a theory for the hydrogen atom, -
Mosley's Atomic Numbers
he concluded that the atomic number is the number of positive charges -
Discovery of the Neutron
He was awarded the Nobel Prize in Physics in the year 1935 for this discovery -
Schrodinger
it is a liner particle differential equation that governs the wave function -
Heisenberg's Uncertainty Princieple
n February 1927, the young Werner developed a key piece of quantum theory, the uncertainty principle, with profound implications