History Of Atoms

By Rose Wiebe
  • 7900 BCE

    Discovery of copper

  • 5000 BCE

    discovery of gold,lead,silver and iron

  • 500 BCE

    Democritus named the atom and thought it had spikes, hooks, and ball and socket joints.

    Democritus named the atom and thought it had spikes, hooks, and ball and socket joints.

  • John Dalton invented the idea of the scientific model

    John Dalton invented the idea of the scientific model

  • J.J Thompson discovered electrons and found out that atoms have a positively charged part and a negatively charged part.

    J.J Thompson discovered electrons and found out that atoms have a positively charged part and a negatively charged part.

  • Henry Becquerel and Pierre and Marie Curie discovered radioactivity.

    Henry Becquerel and Pierre and Marie Curie discovered radioactivity.

  • Dmitri Mendeleev developed the periodic table.

    Dmitri Mendeleev developed the periodic table.

  • Ernest Rutherford discovered that the positive charge comes from a tiny nucleus with neutrons in the center of the atom and electrons surround the nucleus.

    Ernest Rutherford discovered that the positive charge comes from a tiny nucleus with neutrons in the center of the atom and electrons surround the nucleus.

  • Niels Bohr discovered the electron shell.

    Niels Bohr discovered the electron shell.