Atomic Models Worksheet
Explore the evolution of atomic models from early theories to modern quantum mechanics with this Grade 10 science worksheet.
Includes
Standards
Topics
Atomic Models Worksheet
Name:
Date:
Score:
Read each question carefully and provide your best answer. Some questions may require you to recall historical models of the atom.
1. Which atomic model proposed that electrons orbit the nucleus in fixed energy levels, similar to planets orbiting the sun?
Dalton's Atomic Model
Thomson's Plum Pudding Model
Bohr's Atomic Model
Rutherford's Nuclear Model
2. The discovery of the electron led to the rejection of which atomic model?
Bohr's Model
Quantum Mechanical Model
Dalton's Model
Rutherford's Model
3. According to Dalton's atomic theory, all atoms of a given element are in mass and properties.
4. The model described the atom as a sphere of uniformly distributed positive charge with electrons embedded within it.
5. The Rutherford model successfully explained the stability of electrons in orbit around the nucleus.
True
False
6. The quantum mechanical model of the atom describes electron paths as precise orbits.
True
False
7. Briefly explain the main difference between Rutherford's model and Bohr's model of the atom.
8. What is an 'electron cloud' and which atomic model is associated with it?
Match each scientist with their significant contribution to atomic theory.
9. John Dalton
a. Discovered the electron
10. J.J. Thomson
b. Proposed the planetary model of the atom
11. Ernest Rutherford
c. Developed the first atomic theory based on experimental evidence
12. Niels Bohr
d. Proposed electrons orbit in specific energy levels
13. Observe the atomic model below. Which model does this represent, and what are its key features?
