Classify atoms, molecules, elements, and compounds worksheet ... - Free Printable

It looks like you've uploaded an image containing a series of diagrams (numbered 9 through 16) that represent different types of matter at the atomic or molecular level. These are likely part of a worksheet designed to help students identify whether each diagram represents an element, compound, or mixture.

Let’s analyze each one and classify them accordingly:

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Key Definitions:

- Element: Made of only one type of atom.
- Compound: Made of two or more different atoms chemically bonded in a fixed ratio.
- Mixture: Two or more substances (elements or compounds) physically combined, not chemically bonded.

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Analysis of Each Diagram:

#### 9)
- Shows green and orange spheres not bonded together, just mixed.
- Green and orange atoms are separate and randomly distributed.
- Conclusion: This is a mixture of two elements (likely two different elements).
- ✔ Answer: Mixture

#### 10)
- All spheres are identical (same color and size), no bonding shown.
- Represents individual atoms of one element.
- Conclusion: This is a pure element (atoms of the same type).
- ✔ Answer: Element

#### 11)
- Each molecule consists of one black sphere and four red spheres (like CH₄ or similar).
- All molecules are identical — same composition and structure.
- Atoms are bonded together in a fixed ratio.
- Conclusion: This is a compound (e.g., methane-like molecule).
- ✔ Answer: Compound

#### 12)
- One large green sphere with two smaller red spheres attached.
- The atoms are bonded together in a fixed arrangement (looks like CO₂ or H₂O).
- Only one type of molecule present.
- Conclusion: This is a compound (a molecule made of different atoms).
- ✔ Answer: Compound

#### 13)
- All spheres are identical (orange), not bonded, spread out.
- Likely represents atoms of a single element in gaseous form.
- Conclusion: This is a pure element.
- ✔ Answer: Element

#### 14)
- A single large yellow sphere.
- No other particles visible; appears to be one atom or a single particle.
- Could represent an atom of an element (like a noble gas).
- Conclusion: This is a single atom of an element → Element.
- ✔ Answer: Element

#### 15)
- Two types of molecules:
- One molecule has two gray atoms bonded.
- Another has one gray and one white atom.
- Different molecules present, not chemically bonded together.
- Conclusion: This is a mixture of two different substances (could be two elements or a compound and an element).
- ✔ Answer: Mixture

#### 16)
- Multiple identical black spheres, all separate, no bonds.
- All are the same kind of atom.
- Conclusion: This is a pure element (atoms of one element).
- ✔ Answer: Element

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✔ Final Answers:

| Number | Classification |
|--------|----------------|
| 9) | Mixture |
| 10) | Element |
| 11) | Compound |
| 12) | Compound |
| 13) | Element |
| 14) | Element |
| 15) | Mixture |
| 16) | Element |

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🔍 Summary:

- Elements: 10, 13, 14, 16 (only one type of atom)
- Compounds: 11, 12 (fixed ratios of different atoms chemically bonded)
- Mixtures: 9, 15 (multiple substances not chemically bonded)

Let me know if you'd like this turned into a printable answer key or need explanations for a specific student!