Chapter 3 Review

Law of Conservation of Mass states that 

• matter is created
• matter is destroyed
• matter is neither created nor destroyed
• matter does not change

True or False.  Law of Conservation of Mass means that the number of atoms of the products is more than the number of atoms in the reactants. 

• True
• False

The first person to ever talk about an atom was...

• Democritus
• Rutherford
• Dalton
• Bohr

Which scientist disagreed with the idea that atoms existed?

• Democritus
• Aristotle
• Rutherford
• Dalton

The word "atom" comes from a Greek word that means what?

• Invisible
• Indivisible
• Undivided
• Pieces

Which scientist developed the first atomic theory?

• Aristotle
• Dalton
• Democritus
• Bohr

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

Who stated that all atoms of the same element are exactly alike?

• Democritus
• Dalton
• Thomson
• Borh

Place the following scientists in order, from earliest to latest: 
A) Ernest Rutherford
B) J.J. Thomson
C) John Dalton

• B,C,A
• C,A,B
• A,C,B
• C,B,A

Rutherford's Gold Foil Experiment provided evidence that...

• negative and positive charges are spread evenly throughout the atom.
• alpha particles have a positive charge.
• gold is not a dense as previously thought.
• there is a dense positively charged nucleus at the center of an atom.