af Kevin Do 1 år siden
103
Evolution of the Atom By: Kevin Do
Early Greek philosophers had varying ideas about the composition of matter; Aristotle proposed it consisted of five elements, while Democritus suggested it was made of tiny particles.
af Kevin Do 1 år siden
103
Mere som dette
1900's
Max Planack
Nagaoka Hantaro
Albert Einstien
Robert Millikan
Discovered the fact that all electrons carry the same amount of negative charge
Ernest Rutherford
Discovered the nucleus of an atom and created the Rutherford Atomic Model
Neils Bohr
Louis De Broglie
Erwin Schrodinger
Paul Dirac
James Chadwick
Discovered the neutron
Created a fully relativistic quantum theory.
Created the Schrödinger wave equation
Introduced the idea that particles have wave like properties
Modified the Rutherford Model to create the Bohr Model and discovered that electrons orbit the nucleus of fixed sizes and energies
Confirmed the existence of atoms and molecules using mathematical calculations.
Created the Saturnian model.
Theorized that matter emits/absorbs energy in small packets of energy called quantum.
John Dalton
Jöns Jacob Berzelius
Michael Faraday
Dmitri Mendeleev
George Johnson Stoney
Eugen Goldstein
J.J. Thomson
Henri Becquerel
Marie and Pierre Curie
Discovered Polonium, Radium and radioactivity originates within the atom itself.
Discovered radioactivity
Discovered electrons and created the Plum Pudding Model
Discovered protons
Determined the charge of the atom and created the term "electron"
Created the periodic table and arranged it according to atomic weight
Discovered that the structure of an atom was related to electricity/had an electric component to it
First person to measure atomic weights for elements
Discovered that all matter is made up of small particles called "atoms". Also created the Dalton Model
Joseph Priestley
Was the first person to discover that atoms were made of tiny particles
Suggested that all atoms either attract or repelled from each other by "forces".
Thought all matter was created from tiny particles and that the properties of these particles also determined the properties of matter.
