Kami Export - Classification of Matter - Classification of Matter ... - Free Printable

Let's solve the problem in this "Classification of Matter" worksheet step by step. The goal is to classify each diagram as either an element, a compound, or a mixture, based on the particles shown.

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🔍 Key Definitions:

- Element: Made of only one type of atom (same symbol/shape).
- Compound: Made of two or more atoms chemically bonded in a fixed ratio, forming molecules of the same kind.
- Mixture: Contains two or more different substances (elements or compounds) that are not chemically bonded and can be separated physically.

We’ll analyze each box in Model 1:

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🟦 Box 1: R

- Shows 8 circles labeled as "atom".
- All particles are identical atoms (circles), no bonding.
- ✔ This is a pure element.

> Answer: Element

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🟦 Box 2: T & RSq & R

- Contains:
- Triangles (T)
- Squares (Sq)
- Circles (R)
- Also some RSq molecules (circle + square bonded)
- So we have:
- Atoms of T, R
- Molecules of RSq
- Multiple types of particles not chemically bonded together.
- ✔ This is a mixture (of elements and a compound).

> Answer: Mixture

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🟦 Box 3: ? (Top right — all triangles)

- All particles are triangles.
- No bonds shown; just individual particles.
- Since all are the same shape, they represent the same type of atom.
- ✔ This is a pure element.

> Answer: Element

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🟦 Box 4: ? (Middle left — molecules with circle-square-circle)

- Each molecule has one square and two circles.
- All molecules are identical (same structure).
- These are chemically bonded units → compound.
- There’s only one type of molecule.
- ✔ This is a compound.

> Answer: Compound

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🟦 Box 5: RSq (middle center)

- Shows RSq molecules (circle + square bonded).
- Also shows individual atoms (circle and square).
- So there are:
- Some RSq molecules
- Some free R atoms and Sq atoms
- These are not all chemically bonded; mixture of atoms and molecules.
- ✔ This is a mixture.

> Answer: Mixture

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🟦 Box 6: Sq₂

- Shows two squares bonded together (like O₂).
- All molecules are identical: Sq–Sq.
- Only one type of molecule made from same atoms.
- This is a diatomic molecule of an element.
- ✔ This is a pure element (molecular form).

> Answer: Element

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🟦 Box 7: ? (Bottom left — circles and Sq₂ molecules)

- Contains:
- Individual circles (R atoms)
- Sq₂ molecules (two squares bonded)
- Two different types of particles:
- An element (R)
- A molecule of an element (Sq₂)
- Not chemically combined.
- ✔ This is a mixture.

> Answer: Mixture

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🟦 Box 8: TSq₂R

- All particles are identical molecules made of:
- One triangle (T)
- Two squares (Sq)
- One circle (R)
- So formula: TSq₂R
- All molecules are same, chemically bonded.
- ✔ This is a compound.

> Answer: Compound

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🟦 Box 9: SqR₃ & TSq

- Contains two types of molecules:
- SqR₃: Square with three circles
- TSq: Triangle with one square
- Two different molecules present.
- They are not chemically bonded to each other.
- ✔ This is a mixture of two compounds.

> Answer: Mixture

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✔ Final Answers Summary:

| Diagram | Classification |
|--------|----------------|
| R | Element |
| T & RSq & R | Mixture |
| ? (all triangles) | Element |
| ? (R-Sq-R molecules) | Compound |
| RSq (with free atoms) | Mixture |
| Sq₂ | Element |
| ? (R atoms + Sq₂) | Mixture |
| TSq₂R | Compound |
| SqR₃ & TSq | Mixture |

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💡 Explanation:

The classification depends on:
- Whether the particles are atoms or molecules.
- Whether all particles are the same (pure substance).
- Whether different substances coexist without bonding (mixture).
- Whether chemically bonded molecules of the same type exist (compound).

This activity helps visualize how matter is classified at the microscopic level.

Let me know if you'd like a printable version or a labeled diagram!