The Atom Timeline

By aeriyon
  • 460 BCE

    All about the atom

    All about the atom
    Atoms are a unit of matter, the smallest unit of a element. Its consisted of a positively charged nucleus surrounded by a system of electrons.

  • Dalton: Solid Sphere

    Dalton: Solid Sphere
    Today Dalton is known for his atomic theory. John Dalton did experiments with various chemicals that showed that matter seems to consists lumpy particles ( atoms). All matter is made up of tiny particles called atoms.

  • Thomson The Plum Pudding Model

    Thomson The Plum Pudding Model
    Thomson had discovered that atoms are composite objects that are made up of pieces with positive and negative charge. His model looked like raisins stuck on the surface of a lump of pudding. The atom is composed of electrons through G.J

  • Rutherford The Nuclear Model

    Rutherford The Nuclear Model
    1911 the components of the atom had been discovered. The atom consisted of particles called protons and electrons. The model described the atom as a tiny positively charged core also known as the nucleus.

  • Bohr The Bohr Planetary Mode;

    Bohr The Bohr Planetary Mode;
    Niels Bohr proposed the Bohr Model of the Atom in 1915. Has an atom consisting of a small,positive charged nucleus orbited by negative charged electrons. The model of the atom is based on quantum mechanics.

  • Schrodinger: Quantum Mechanics Model

    Schrodinger: Quantum Mechanics Model
    Erwin Schrodinger proposed the quantum mechanical model of the atom, which treats electrons as matter waves. Schrodinger used mathematical equations to describe the likelihood of finding an electron in a certain position. Dense nucleus surrounded by electrons at various levels.