Discovery Of The Atom

Discovery of the Atom—Chem 5.2

Name _____________________

J.J Thomson (__________________________)

E. Goldstein (__________________________)

What did J.J. Thomson Discover about the atom?

What did E. Goldstein Discover about the atom?

Describe the experiment used in his discovery:

Describe the experiment used in his discovery:

Draw a picture of experiment:

James Chadwick (_________________________)

Ernest Rutherford (_______________________)

What did James Chadwick Discover about the atom?

What did Ernest Rutherford Discover about the atom?

Describe the experiment used in his discovery:

Describe the experiment used in his discovery:

Draw a picture of experiment

Questions: 1. What subatomic particles are found in the nucleus of the atom? 2. What are the charges of each of the subatomic particles? 3. Atoms are mostly _________________ space. The protons and neutrons are found in a small region called the______________________ and electrons are found _____________________ the nucleus.

Terms to Know: Define or Explain the Following Terms or Ideas: 1. Atom 2. Dalton’s Atomic Theory 3. John Dalton 4. Democritus 5. Electrons 6. Cathode ray 7. Neutrons 8. Nucleus 9. Anode 10. Cathode Fill in the Following Chart (use page 111 in book)

Particle Proton Neutron Electron

Symbol

Charge

Mass

At this Point Draw what you Think an Atom Looks like and label the Parts (P,N,E)

Location