History of Atomic Models
Explore the evolution of atomic theory with this Grade 8 science worksheet covering key models and scientists.
Includes
Standards
Topics
History of Atomic Models
Name:
Date:
Score:
Read each question carefully and answer to the best of your knowledge. This worksheet covers the historical development of atomic models.
1. Which scientist proposed the 'plum pudding' model of the atom?
John Dalton
J.J. Thomson
Ernest Rutherford
Niels Bohr
2. The gold foil experiment led to the discovery of which part of the atom?
Electrons
Protons
Neutrons
Nucleus
3. Dalton's atomic theory stated that all matter is made of indivisible and indestructible particles called .
4. The Bohr model proposed that electrons orbit the nucleus in specific energy levels or .
5. Describe one key difference between the Rutherford model and the Bohr model of the atom.
6. J.J. Thomson discovered the electron.
True
False
7. The most current atomic model is still the Bohr model.
True
False
8. Examine the Bohr model of the atom below and answer the question.
In the Bohr model, what do the circles around the center represent?