Atomic theory

The Atomic Theory

By TaylorTimmons39

  • Antoine Lavoisier

    Lavoisier proved the Law Of Conservation. The Law states that mass can not be created or destroyed and that the mass of what you use to cause it to react must have the same mass as the product. Lavoisier also figured out that Hydrogen and Oxygen make water.

  • Joseph Proust

    Proust came up with the Law Of Definite Proportions. The Law Of Definite Proportions is the ratio of elements in a compound will always stay the same. The law Proust came up with helped Dalton come up with the Atomic Theory.

  • John Dalton

    Dalton's theory became known as Dalton's Law Of Partial Pressures. Dalton eventually came up with the Atomic Theory. The Atomic Theory had four parts. The first part was that all matter is made up of atoms and atoms can not be destroyed. The second part is that all atoms in the same element have the same mass and properties. The third thing the theory said was that compounds are formed by different types of atoms. The fourth part was that when atoms chemically react they rearange.

  • Michael Faraday

    Faraday put two opposite electrodes in a solution of water containing some type of dissolved compound. He observed that one compound attached to one electrode and the other compound on the other electrode. His experiment is the reason atoms joined in compounds.

  • Michael Faraday

    Faraday experimented with putting two electrodes on one compund. When he tested this experiment, one electrode attached to one side of the compound and the other electrode attached to the other side of the compound. Faraday's experiment helped with the Law Of Conservation Of Energy.

  • Sir William Crookes

    Crookes discovered that Cathode Rays travel in a straight line, cause whatever they hit to produce heat when striking. He also discovered Thallium.

  • George Stoney

    Stoney discovered that electricity was made up of discrete negative particles. He called these particles eletrons.

  • JJ Tomson

    Tomson studied the Cathode Ray. During his studies he discovered that atoms had a charge-mass ratio. Tomson also discovered Electrons. Tomson came up with the "Plum Pudding" model. The model was used to help people understand what an atom looks like. The pudding were the protons and the plums were the neutrons.

  • Marie Curie

    Marie Curie and her husband were studying the elements Uranium and Thorium. They came up with Radioactivity. Radioactivity is the unstable atomic nuclei will spontaneously decompose to form nuclei with a higher stability.

  • Max Planck

    Planck came up with quantum theory. He came up with an equation that later became known as Planck's Constant. During his discovery he also discovered that energy is released in small bursts not wavelengths.

  • Ernest Rutherford

    Rutherford came up with the Gold Foil Experiment. The Gold Foil Experiment said that if you shoot atoms through a piece of thin Gold foil it will go all the way through. When he tested his experiment a small amound came back proving that there was something inside an atom. This led to the discovery of protons, neutrons, and electrons.

  • Henry Moseley

    Moseley determined that nuclei had charges and he also determined what the charges are. "The atomic number is the same as the number of protons in the nucleus." Moseley's dicovery led to the periodic table changing from the atomic mass to the atomic number.

  • Niels Bohr

    Bohr combined ideas from Planck and Rutherford and came up what the atomic structure looked like. Bohr discovered that electrons travel in their own orbits. He was mainly known for Bohr's model.

  • Werner Heisenberg

    Heisenberg described atoms by a formula connected to the frequencies of spectral lines. Heisenberg also came up with the principle of indeterminancy. The Principle Of Indeterminancy states that you can not know both the position and velocity of a particle.

  • James Chadwick

    Chadwick and Rutherford started discovering that there wasn't just protons and electrons in an atom but, something else. Chadwick repeated Frederic and Irene's experiments looking for a neutral particle. His experiments lead him to the discovery of the neutron.

  • Enrico Fermi

    Fermi was the first person to control a chain reaction by releasing energy from the nucleus. This later helped make an atomic bomb.

  • Work Cited

    Palermo, Elizabeth. Niels Bohr: Biography & Atomic Theory. Live Science. 14 May 2013 Web. 18 November 2013. (Niels Bohr)

    Antoine Lavoisier. Atomic Model.tripod. Web. 18 November 2013. (Antoine Lavoisier)

    "Proust." Proust. Web. 18 Nov. 2013. (Joseph Proust)
    "Dalton's Atomic Theory." Dalton's Atomic Theory. Web. 18 Nov. 2013. (John Dalton)
    "Sir William Crookes (British Chemist)." Encyclopedia Britannica Online. Encyclopedia Britannica. Web. 18 Nov. 2013. (William Crookes)
    Palermo, Elizabeth.