The Discovery of Atomic Structure

Named atom from a word meaning "indivisible" in Greek

• Democritus

• Dmitri Mendelev

• Ernest Rutherford

• Henry Moseley

Made Solid Sphere Model

• Dmitri Mendeleev

• John Dalton

• JJ Thomspson

• Ernest Rutherford

Made Plum Pudding Model; Positively charged Sphere with negative particles embedded throughout

• JJ Thompson

• Ernest Rutherford

• Schrodinger and Heisenberg

• Niels Bohr

Performed the gold foil experiment

Discovered number of protons is unique to each element (atomic number) and arranged Periodic Table this way

• Niels Bohr

• John Dalton

• Henry Moseley

• Dmitri Mendelev

Discovered electrons are negatively charged particles that travel in fixed orbits around the Positively charged nucleus that is made of positive protons and neutral neutrons

• Schrodinger and Heisenberg

• Dmitri Mendelev

• Ernest Rutherford

• Niels Bohr

Discovered the nucleus is surrounded by an electron cloud that is divided into shells, but electrons do not travel in fixed orbits

• Schrodinger and Heisenberg

• Dmitri Mendelev

• Democritus

• Ernest Rutherford

Developed first atomic table of elements organized by atomic mass

• Dmitri Mendelev

• John Dalton

• Henry Mendelev

• Ernest Rutherford