The Atom

Who was the first to propose that all things are made of atoms?

• John Dalton
• Democritus
• Joseph Thomson
• Earnest Rutherford

Who proposed the atomic theory?

• Democritus
• John Dalton
• Joseph Thomson
• Earnest Rutherford

Are atoms divisible?

• Yes
• No

Who discovered the electron?

• Democritus
• John Dalton
• Joseph Thomson
• Earnest Rutherford

Who determined the nucleus is in the center of the atom?

• John Dalton
• Joseph Thomson
• Democritus
• Earnest Rutherford

Electrons are attracted to ________________.

• Positive charges
• Negative charges
• Neutral particles

Who came up with the plum pudding model?

• Joseph Thomson
• Earnest Dalton
• Democritus
• John Rutherford

The majority of the mass of the atom is located.

• Evenly throughout the atom
• In the nucleus
• Outside the nucleus

Are all atoms of the same type identical?  For example are all carbon atoms the same?

• Yes
• No

Where are protons located in an atom?

• Inside the nucleus
• Outside the nucleus
• they are evenly distributed throughout the atom.