Introducing 

Prezi AI.

Your new presentation assistant.

Refine, enhance, and tailor your content, source relevant images, and edit visuals quicker than ever before.

Loading…
Transcript

Atomic Model Project Timeline

:Bennett Atchison

J.J. Thomas

John Dalton

Eugen Goldstein

Democritus

Goldstein studied cathode rays, otherwise known as electrons, in 1886 and discovered the canal ray, which moved in the opposite direction through holes in the cathode.

Thomas also did research on the cathode and devised a formula for the mass of an atom determined by it's charge. He then applied his knowledge of electrons and created the "Plum Pudding Model" of an atom in 1897.

Dalton suggested that all atoms were invisible, indestructible, and were only identical when of the same element. He also created a system of atomic weights in 1803.

Democritus believed that the universe was made up of an infinite of differently shaped and sized atoms. He determined the size and shape of the atoms by looking at the substance they made up. He did all this without using any equipment.

Modern Model

Planetary Model

Solid Sphere Model

Neils Bohr

Ernest Rutherford

Albert Einstein

Robert A. Millikan

Rutherford devised and experiment in 1911 where he fired alpha particles at gold foil, probing it. When most of the particles went through he realized that the nucleus of an atom must be extremely small. He also created a diagram of an atom similar to the planets surrounding the sun.

Bohr came to Cambridge in 1911 and two years later, after being reviewing some of Rutherford's work on the atomic nucleus, came to a representation of the structure of an atom when under certain conditions.

Einstein is one of the most well known scientists. In 1905 he wrote a paper describing that when a particle absorbs a photon it releases electrons. He called this the "Photoelectric Effect".

Millikan conducted an oil drop experiment in 1909 which showed the charge of an electron. This was then used in J.J. Thomas's equation to determine mass.

Quantum Mechanical Model

Nuclear Model

Wolfgang Pauli

Louis de Broglie

Erwin Schrodinger

Werner Heisenberg

James Chadwick

Pauli introduced a rule in 1924 called "Pauli's Excluson Principle". This rule dictated that no two electrons in an atom can have the same quantum numbers.

Broglie took Einstein's idea that light can come in the form of particles and waves and applied it to atoms. He then came up with an equation to show how they reactin 1923.

Schrodinger made a diagram of an atom in which the particles around it were drawn in several places in 1930. This confused the way they thought of atoms, but helped mathematically.

Heisenberg discovered that the velocity at which a particle moves and the position of that particle can not both be determined. This is known as the "Heisengberg Uncertainty Principle" in 1927.

Chadwick conducted an experiment in 1932 that used alpha particles to find a atomic particle that was neutral and was close in mass to a proton. This particle was a nuetron.

Learn more about creating dynamic, engaging presentations with Prezi