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Transcript of Chemistry Timeline
By: William Schoneman
He is the guy that came
up with the atomic theory.
Invented the system
of chemical nomenclature
Law of Conservation of Mass
States that the mass of an
isolated system will remain
constant over time
Law of Definite Proportions
States that a chemical compound always contains exactly the same
proportion of elements by mass
Developed the atomic theory upon which modern physical science use his theory that matter is composed of atoms of differing weights and combine in simple ratios by weight.
Dalton's Atomic Theory
Positive nucleus and some negative
electrons have a
orbit around each other
Thomson was the first
to discover the electron.
Used the ray tube to
defect light and was
able to see
Arranged the periodic
table by atomic
negatively charge electrons
were added to a positive
soup like plum pudding
American experimental physicist know for his measurement of the charge on the electron and for photoelectric effect.
Gold Foil Experiment
Gold foil experiment showed that there was a nucleus in the center of each atom
Worked in nuclear physics and is know for his theory of the structure of the atom.
Model replaced the plum pudding model of J.J. Thomson
Berthollet did not believe that
substances always combine in constant and definite proportions
His law jump started the atomic physics
by providing the first
evidence in favour
of Bohr's theory
Bohr Planetary model
depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus
Quantum Mechical Model
branch of physics dealing with physical phenomena at microscopic scales, where the action is
in the order of the plank constant
he wrote results for the quantum theory,
thus forming the basics
of the wave mechanics
he made the planetery model