-
340
Aristotle
Didn't believe in the “nothingness” of empty space. Eventually Democritus's ideas were rejected because of Aristotle. 340 B.C -
400
Democritius
Matter is composed of empty of space though which atoms move. Atoms are solid, homogeneous, indestructible, and invisible. 400 B.C -
Period: 400 to
Years
400 B.C -
Amadeo Avogadro
equal volumes of all gases, at the same temperature and pressure, have the same number of molecules. -
Revolutionary War
It happened from 1775-1783 and involved the British and United States and the U.S won it. -
Antoine Lavosier
came up with the law of conservation. -
Invention of hot-air balloon
Created by Joseph and Jacques Montogolfier in 1783 and was used to carry humans through the air. -
Joseph Proust
Made the law of definite proportions -
War of 1812
It happened from 1812-1815 and was again between the British and U.S and nobody really won this war. -
Invention of the phone
Alexander Graham Bell invented the telephone in 1876 and it was the first machine that trasmittted sound by electricity. -
William Crookes
he studied the effects of sending an electric current through a gas in a sealed tube that had electodes at either end and a flow of electically charged particles. -
Invention of the light bulb
Thomas Edison invented the incandescent light bulb in 1879, which turned on a light that used electicity instead of lamps and candles. -
Henry Becquerel
He discovered natural radioactivity -
Invention of Aspirin
Bayer firm created the first mass produced aspirin in 1897 which helped headaches. -
Invention of air conditioning
Willis Carrier invente dthe first air conditioner in 1902, that would air condition building and houses. -
First successful flight
The Wright brothers conducted the first successful flight in 1903 and also inventing the first successful airplane. -
J.J. Thomson
His model used the first electron. -
Albert Einstein
first person to probe the existance of atoms with a microscope. -
Robert Millikan
he measured the charge on an electron with an oil-drop apparatus. -
Henry Mosely
the atom conatins in its nucleus a number of positive nuclear cahrges that is equal to its atomic number in the periodic table. -
Ernest Rutherford
founded the components of the atom -
Madame Curie
discovered radioactive elements polonium and radium -
Niels Bohr
an atom is a small positively charged nucleus surrounded by orbiting electrons. -
Max Planck
he created the quantum theory. -
Erwin Schrodinger
he combined the equations for the behavior of waves with the de Broglie equation to generate a mathematical model for the distribution of electrons in an atom. -
Louis de Broglie
he worked on the wave nature of electrons. -
Werner Heisenberg
suggested in 1932 that any theory of the atom must be based on observable phenomenon, such as the spectral lines emitted by atoms. -
James Chadwick
discovered the neutron -
Invention of the airbag
Invented by John Hetrick in 1951 which was used in cars to stop protect your head in a car crash. -
Invention of AstroTurf
James Faria and Robert Wright invented Astroturf in 1965. which was a synthetic turf.