History of an Atom

By marlainaandchandler
  • 350

    Aristotle B.C.

    Aristotle B.C.
    He believed that matter was not made up of atoms but was made up of earth, air, wind, and fire and could be divided. he used theories from observations. Reijin, Vickie. "Development of the Atomic Theory." Prezi.com. N.p., n.d. Web. 06 Mar. 2014.
  • 460

    Democritus B.C.

    Democritus B.C.
    He dscovered atoms. Came up with the idea that everything is made up of atoms and cant be broken down into smaller particles. Didnt support his idea with any facts or experiments. Reijin, Vickie. "Development of the Atomic Theory." Prezi.com. N.p., n.d. Web. 06 Mar. 2014.

  • Dalton A.D

    Dalton A.D
    He agreed with Democritus but challeged Aristotle. Also believed atoms of the same element are exactly alike. Also that compounds can be formed by two or more atoms of different elements. He applied his concept to a table of atomic weights, in a paper on absorption of gases and Daltons Law. Reijin, Vickie. "Development of the Atomic Theory." Prezi.com. N.p., n.d. Web. 06 Mar. 2014.

  • Thomson A.D

    Thomson A.D
    He discovered that there seemed to be a negaively charged particle in an atom. which mad them be abe to be able to split more. We call these electrons. He used a CRT to determine the charge to mass to ration of an electron. Reijin, Vickie. "Development of the Atomic Theory." Prezi.com. N.p., n.d. Web. 06 Mar. 2014.

  • Rutherford A.D

    Rutherford A.D
    He relized that the atoms must have almost all of its mass st itss center, in a nucleus with the vast majority of the atom empty. He conducted the Gold Foil Experiment in which they studied the deflecion angles of "alpha paricles" Reijin, Vickie. "Development of the Atomic Theory." Prezi.com. N.p., n.d. Web. 06 Mar. 2014.

  • Bohr A.D

    Bohr A.D
    He believed electrons orbit the nucleus witout losing energy and could only move in fixed orbits of specific energies. He condcted experiments. Reijin, Vickie. "Development of the Atomic Theory." Prezi.com. N.p., n.d. Web. 06 Mar. 2014.

  • Heisenberg and Schrodinger A.D

    Heisenberg and Schrodinger A.D
    Heisenberg proposed principles of momentum of particles and Schrodinger discovered charged nucleus surronded by negatively charged electrons. they used mathematical equations. Reijin, Vickie. "Development of the Atomic Theory." Prezi.com. N.p., n.d. Web. 06 Mar. 2014.