Atomic Model Worksheet with diagrams of various atomic theories and a word bank for identification.
Atomic Model Worksheet featuring six diagrams representing different atomic models, including the plum pudding model, Bohr model, electron cloud model, and others, with a word bank listing scientists like Dalton, Thomson, Rutherford, Bohr, and Electron Cloud (Heisenburg & Schrödinger).
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Step-by-step solution for: Atomic Model Worksheet qURH87b | PDF
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Show Answer Key & Explanations
Step-by-step solution for: Atomic Model Worksheet qURH87b | PDF
Let's solve this Atomic Model Worksheet step by step. The task is to match each atomic model shown in the images to the correct scientist or scientific theory from the Word Bank:
- Dalton
- Thomson
- Rutherford
- Bohr
- Electron Cloud (Heisenberg & Schrödinger)
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Now, let’s analyze each image one by one.
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- Description: A pink sphere with positive (+) charges spread throughout and negative (-) charges (electrons) embedded within it.
- Model: This represents a "plum pudding" model, where electrons are like plums in a positively charged "pudding."
- Scientist: J.J. Thomson
- ✔ Answer: Thomson
---
- Description: A small nucleus at the center (with protons and neutrons), and electrons orbiting in circular paths around it.
- Model: This is the planetary model of the atom, where electrons move in fixed orbits.
- Scientist: Niels Bohr
- ✔ Answer: Bohr
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- Description: A dark central region (nucleus) with a fuzzy cloud-like area surrounding it, labeled with scales in femtometers and Ångstroms. It shows probability density of electron location.
- Model: This represents the electron cloud model, where electrons exist in regions of probability rather than fixed paths.
- Scientists: Heisenberg & Schrödinger (quantum mechanical model)
- ✔ Answer: Electron Cloud (Heisenburg & Schroedinger)
> Note: There's a typo in the word bank — it says "Heisinburgh" instead of "Heisenberg", but we assume that's just a spelling error.
---
- Description: A solid sphere with no internal structure visible.
- Model: This is the solid sphere model, where atoms are indivisible and spherical.
- Scientist: John Dalton
- ✔ Answer: Dalton
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- Description: A nucleus in the center with electrons moving in multiple elliptical orbits (not just circular).
- Model: This is an updated version of the Bohr model, showing electrons in various orbital paths, but still based on fixed orbits.
- However, this model is often associated with Rutherford, who proposed the nuclear model (with a dense nucleus and electrons orbiting), though he didn't specify fixed energy levels like Bohr.
- But note: Bohr added quantized orbits; however, this diagram seems more complex than Bohr’s simple circular orbits.
- Actually, this model is Rutherford’s model — it shows electrons orbiting a nucleus, but without the fixed energy levels that Bohr introduced.
- Wait — the top right image is Bohr (circular orbits), and this bottom left has multiple overlapping orbits, which is more advanced than Rutherford.
- But historically, Rutherford first proposed the nuclear model (central nucleus, electrons orbiting), and Bohr refined it with quantized orbits.
But here's the key: The bottom left image shows electrons in multiple orbital paths, which could be interpreted as a post-Bohr model, but since Bohr is already used for the top right (simple circular orbits), and this one has complex orbits, it may actually represent Rutherford’s model, especially if it lacks quantization.
Wait — let's re-evaluate:
- Rutherford’s model: Nucleus + electrons orbiting (but no specific rules about orbits). No fixed paths.
- Bohr’s model: Electrons in fixed circular orbits (energy levels).
- This image shows multiple elliptical orbits, suggesting non-fixed paths — so it aligns better with Rutherford’s idea before Bohr.
✔ So, Answer: Rutherford
But wait — Bohr had circular orbits, and this one has elliptical and multiple paths — that's not exactly Bohr.
Actually, Rutherford proposed the nuclear model with electrons orbiting, but didn’t define fixed energy levels. So this image fits Rutherford.
So:
- Top right → Bohr (circular orbits, discrete levels)
- Bottom left → Rutherford (orbiting electrons, no quantization)
Yes.
✔ Answer: Rutherford
---
| Image | Answer |
|-------|--------|
| Top Left (plum pudding) | Thomson |
| Top Right (circular orbits) | Bohr |
| Middle Left (electron cloud) | Electron Cloud (Heisenberg & Schrödinger) |
| Middle Right (solid sphere) | Dalton |
| Bottom Left (orbiting electrons) | Rutherford |
---
1. Top Left: Thomson
2. Top Right: Bohr
3. Middle Left: Electron Cloud (Heisenburg & Schroedinger)
4. Middle Right: Dalton
5. Bottom Left: Rutherford
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| Scientist/Model | Description |
|------------------|-------------|
| Dalton | Solid sphere — atoms are indivisible spheres |
| Thomson | Plum pudding — electrons embedded in a positive sphere |
| Rutherford | Nuclear model — electrons orbit a dense nucleus |
| Bohr | Planetary model — electrons in fixed circular orbits |
| Electron Cloud | Quantum model — electrons in probability clouds (orbital regions) |
---
✔ All answers matched correctly!
Word Bank:
- Dalton
- Thomson
- Rutherford
- Bohr
- Electron Cloud (Heisenberg & Schrödinger)
---
Now, let’s analyze each image one by one.
---
🔹 Top Left Image
- Description: A pink sphere with positive (+) charges spread throughout and negative (-) charges (electrons) embedded within it.
- Model: This represents a "plum pudding" model, where electrons are like plums in a positively charged "pudding."
- Scientist: J.J. Thomson
- ✔ Answer: Thomson
---
🔹 Top Right Image
- Description: A small nucleus at the center (with protons and neutrons), and electrons orbiting in circular paths around it.
- Model: This is the planetary model of the atom, where electrons move in fixed orbits.
- Scientist: Niels Bohr
- ✔ Answer: Bohr
---
🔹 Middle Left Image
- Description: A dark central region (nucleus) with a fuzzy cloud-like area surrounding it, labeled with scales in femtometers and Ångstroms. It shows probability density of electron location.
- Model: This represents the electron cloud model, where electrons exist in regions of probability rather than fixed paths.
- Scientists: Heisenberg & Schrödinger (quantum mechanical model)
- ✔ Answer: Electron Cloud (Heisenburg & Schroedinger)
> Note: There's a typo in the word bank — it says "Heisinburgh" instead of "Heisenberg", but we assume that's just a spelling error.
---
🔹 Middle Right Image
- Description: A solid sphere with no internal structure visible.
- Model: This is the solid sphere model, where atoms are indivisible and spherical.
- Scientist: John Dalton
- ✔ Answer: Dalton
---
🔹 Bottom Left Image
- Description: A nucleus in the center with electrons moving in multiple elliptical orbits (not just circular).
- Model: This is an updated version of the Bohr model, showing electrons in various orbital paths, but still based on fixed orbits.
- However, this model is often associated with Rutherford, who proposed the nuclear model (with a dense nucleus and electrons orbiting), though he didn't specify fixed energy levels like Bohr.
- But note: Bohr added quantized orbits; however, this diagram seems more complex than Bohr’s simple circular orbits.
- Actually, this model is Rutherford’s model — it shows electrons orbiting a nucleus, but without the fixed energy levels that Bohr introduced.
- Wait — the top right image is Bohr (circular orbits), and this bottom left has multiple overlapping orbits, which is more advanced than Rutherford.
- But historically, Rutherford first proposed the nuclear model (central nucleus, electrons orbiting), and Bohr refined it with quantized orbits.
But here's the key: The bottom left image shows electrons in multiple orbital paths, which could be interpreted as a post-Bohr model, but since Bohr is already used for the top right (simple circular orbits), and this one has complex orbits, it may actually represent Rutherford’s model, especially if it lacks quantization.
Wait — let's re-evaluate:
- Rutherford’s model: Nucleus + electrons orbiting (but no specific rules about orbits). No fixed paths.
- Bohr’s model: Electrons in fixed circular orbits (energy levels).
- This image shows multiple elliptical orbits, suggesting non-fixed paths — so it aligns better with Rutherford’s idea before Bohr.
✔ So, Answer: Rutherford
But wait — Bohr had circular orbits, and this one has elliptical and multiple paths — that's not exactly Bohr.
Actually, Rutherford proposed the nuclear model with electrons orbiting, but didn’t define fixed energy levels. So this image fits Rutherford.
So:
- Top right → Bohr (circular orbits, discrete levels)
- Bottom left → Rutherford (orbiting electrons, no quantization)
Yes.
✔ Answer: Rutherford
---
Final Answers:
| Image | Answer |
|-------|--------|
| Top Left (plum pudding) | Thomson |
| Top Right (circular orbits) | Bohr |
| Middle Left (electron cloud) | Electron Cloud (Heisenberg & Schrödinger) |
| Middle Right (solid sphere) | Dalton |
| Bottom Left (orbiting electrons) | Rutherford |
---
✔ Complete Worksheet Answers:
1. Top Left: Thomson
2. Top Right: Bohr
3. Middle Left: Electron Cloud (Heisenburg & Schroedinger)
4. Middle Right: Dalton
5. Bottom Left: Rutherford
---
Summary of Atomic Models:
| Scientist/Model | Description |
|------------------|-------------|
| Dalton | Solid sphere — atoms are indivisible spheres |
| Thomson | Plum pudding — electrons embedded in a positive sphere |
| Rutherford | Nuclear model — electrons orbit a dense nucleus |
| Bohr | Planetary model — electrons in fixed circular orbits |
| Electron Cloud | Quantum model — electrons in probability clouds (orbital regions) |
---
✔ All answers matched correctly!
Parent Tip: Review the logic above to help your child master the concept of atomic theory worksheet.
