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Period: 460 BCE to 370 BCE
Democritus
Atoms and the void as the fundamental constituents of the physical world. -
Period: 1300 to
End of the Ottoman Empire
replaced by the Turkish Republic and various successor states in southeastern Europe and the Middle East -
Dalton ‘s Atomic Theory and Atomic Model
All matter is composed of extremely small particles called atoms. -
Volta’s invention of the battery
"voltaic pile" operated by placing pieces of cloth soaked in salt water between pairs of zinc and copper discs -
Darwin’s “On the Origin of Species” published
Origin of Species sold out immediately. Most scientists quickly embraced the theory that solved so many puzzles of biological science -
Assassination of Abraham Lincoln
John Wilkes Booth held that belief, and it was the motive behind his plot to murder President Abraham Lincoln -
Mendeleev’s Periodic Table
Dmitri Ivanovich Mendeleev was a Russian chemist and inventor. He is best known for formulating the Periodic Law and creating a version of the periodic table of elements. -
Thomas Edison’s invention of the phonograph
a device that recorded sound onto tinfoil cylinders. -
Thomas Edison’s invention of the light bulb
It worked by passing electricity through a thin platinum filament in the glass vacuum bulb, which delayed the filament from melting -
Naismith’s invention of basketball
sports coach, best known as the inventor of the game of basketball. -
Thompson’s CRT, Discovery of Electrons, and Atomic Model
all atoms contain tiny negatively charged subatomic particles or electrons. -
Einstein’s Theory of Relativity
the laws of physics are the same for all non-accelerating observers -
Rutherford’s Gold Foil Experiment and Atomic Model
Rutherford proposed the nuclear model of the atom -
Sinking of the Titanic
The Titanic sank because of an iceberg -
Moseley’s Periodic Table
arranged the elements in the periodic table according to atomic numbers -
Bohr’s Atomic Model
electrons (negatively charged) revolve around the positively charged nucleus in a definite circular path called orbits or shells -
Discovery of Protons
The discovery of the proton is credited to Ernest Rutherford, who proved that the nucleus of the hydrogen atom -
Women gained the right to vote
The 19th Amendment makes it illegal to deny the right to vote to any citizen based on their sex, which effectively granted women the right to vote -
Electron Cloud Model Introduced
In atomic theory and quantum mechanics, an atomic orbital is a function describing the location and wave-like behavior of an electron in an atom. -
Discovery of Neutron
The British physicist Sir James Chadwick discovered neutrons