The atom and atomic structure

This was the first model of the atom ever proposed. It was simple and described atoms as tiny spheres that could not be broken down into smaller pieces.

• Democritus's model of the atom
• The "Plum Pudding Model" of the atom
• The "Rutherford Model" of the atom
• The "Quantum Mechanical Model" of the atom

Discovered the electron using cathode ray tube

• Joseph Thomson
• John Dalton
• Ernest Rutherford
• Robert Millikan

Idea was of an indivisible particle of matter he called "atomos"

• John Dalton
• Aristotle
• Democritus
• Plato

What contribution did John Dalton make to atomic theory? 

• He discovered that every atom was positively charged. 
• He discovered that every element consisted of one type of atom.  
• He discovered that atoms had nuclei. 
• He discovered that atoms could be divided into smaller parts. 

J.J. Thomson provided evidence that an atom...

• is the smallest particle of matter
• contains negatively charged particles
• has an overall negative charge
• has an overall positive charge

Discovered the neutron

• Chadwick
• Rutherford
• Thomson
• Bohr

Nuclear model

• Rutherford
• Thomson
• Bohr
• Dalton

Discovered the electron

• Bohr
• Dalton
• Rutherford
• Thomson

Planetary model

• Thomson
• Bohr
• Dalton
• Schrodinger

Gold foil experiment

• Dalton
• Bohr
• Rutherford
• Schrondinger