Discovery of the Atom

What Greek philosopher first spoke about the idea of an atom?

• Democritus
• Dalton
• Thompson
• Rutherford

The word “atom” comes from the Greek “atomos."  What does "atomos" translate to?

• Important
• Atmosphere
• Indivisible
• Cuttable

Which is the correct sequence of the scientists who made major changes in the model of the atom?
1-JJ Thomson
2-Erwin Schrodinger
3-John Dalton
4-Niels Bohr
5-Ernest Rutherford

• 2, 1, 4, 3, 5
• 3, 1, 5, 4, 2
• 5, 3, 2, 1, 4
• 4, 3, 2, 1, 5

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. 

Tags

NGSS.HS-PS1-7

What scientist is best known for his "Plum Pudding" model of the atom?

• J.J. Tomson
• Ernest Rutherford
• John Dalton
• Democritus

Which scientist discovered the electron?

• Bohr
• Rutherford
• Dalton
• Thomson

Which scientist discovered the nucleus?

• Bohr
• Rutherford
• Chadwick
• Thomson

Tags

NGSS.HS-PS1-8

Who is the scientist who proposed the "solar system" model of an atom where the electrons orbit around the nucleus?

• Democritus
• Niels Bohr
• Ernest Rutherford
• Chadwick

Which scientist described electrons as waves that move in orbitals? 

• Thomson
• Rutherford
• Schrodinger
• Chadwick

What scientist discovered the neutron?

• Chadwick
• Schrodinger
• Thompson
• Rutherford