History of Atomic Models
Explore the historical development of atomic models, from early ideas to the Bohr model, understanding how scientists' understanding of the atom evolved over time.
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History of Atomic Models
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Read each question carefully and answer to the best of your ability. This worksheet covers the history of atomic models.
1. Which ancient Greek philosopher first proposed the idea of 'atomos' or indivisible particles?
Aristotle
Plato
Democritus
Socrates
2. Which scientist developed the 'plum pudding' model of the atom?
John Dalton
J.J. Thomson
Ernest Rutherford
Niels Bohr
3. Dalton's atomic theory stated that all matter is made of tiny, indivisible particles called .
4. The Rutherford model of the atom proposed a small, dense at the center.
5. Briefly describe one key difference between the Thomson (plum pudding) model and the Rutherford (nuclear) model of the atom.
6. Niels Bohr proposed that electrons orbit the nucleus in specific energy levels.
True
False
7. The Bohr model is still considered the most accurate representation of the atom today.
True
False
8. Observe the image below, which represents the Bohr model of an atom. Label the parts indicated.
A:
B:
C: