Classification of matter pogil - Free Printable

Let's solve the problem in this image step by step.

---

Objective:

Classify each of the given models as either:
- Element (made of only one type of atom),
- Compound (made of two or more types of atoms chemically bonded together),
- Mixture (a physical combination of different substances that are not chemically bonded).

We’ll analyze each box based on the particles shown and their composition.

---

Model 1:

#### Box 1: R
- Contains 8 circles, all labeled as "atom".
- All particles are identical (same shape and symbol).
- No chemical bonds shown between them.

✔ Classification: Element
> Reason: Only one type of atom present, no bonding.

---

#### Box 2: T & RSq & R
- Shows triangles (T), squares (Sq), and circles (R).
- The particles are not bonded to each other; they are just mixed.
- There are individual T, RSq (circle + square), and R.

Wait — let’s clarify:

Looking closely:
- There are triangles (T),
- Squares (Sq),
- Circles (R),
- And some molecules made of R and Sq (labeled "RSq molecule"),
- But also individual R and T.

So there are:
- Atoms: R, T
- Molecules: RSq (compound)
- And free atoms of R and T

But these are not chemically bonded into a single substance. They coexist separately.

✔ Classification: Mixture
> Reason: Multiple substances (atoms and molecules) physically combined, not chemically bonded.

---

#### Box 3: ? (top right)
- Contains only triangles (T).
- All are identical.
- No chemical bonds shown.

✔ Classification: Element
> Reason: Only one type of atom (T), no bonding.

---

#### Box 4: ? (bottom left)
- Contains molecules made of two circles (R₂) and one circle + one square (RSq).
- Also has free atoms (circles and squares).
- Some molecules are shown with chemical bonds.

But wait — look carefully:
- There are R₂ molecules (two circles bonded),
- RSq molecules (circle + square bonded),
- And free atoms (R and Sq).

These are different molecules and atoms existing together.

✔ Classification: Mixture
> Reason: A combination of different substances (R₂, RSq, and free atoms) that are not uniformly bonded.

---

#### Box 5: RSq molecule
- Contains 5 particles, each made of one circle (R) and one square (Sq).
- These are chemically bonded (as indicated by arrows).
- All particles are identical.

✔ Classification: Compound
> Reason: Two different atoms (R and Sq) chemically bonded in fixed ratio (1:1), forming a compound.

---

#### Box 6: Sq₂
- Contains molecules made of two squares (Sq₂).
- All molecules are identical.
- Chemical bonds are shown between the squares.

✔ Classification: Element
> Reason: Only one type of atom (Sq), but bonded in diatomic molecules. Still, it's pure Sq, so an element.

> Note: Diatomic molecules like O₂ or N₂ are still classified as elements.

---

#### Box 7: ? (bottom left, below RSq)
- Contains:
- One circle (R),
- Several square molecules (Sq₂),
- Some RSq molecules.
- Different types of particles present.

✔ Classification: Mixture
> Reason: Combination of different substances (R atoms, Sq₂ molecules, RSq molecules) not chemically bonded together.

---

#### Box 8: TSq₄ & TSq
- Contains TSq₄ (triangle + four squares) and TSq (triangle + one square).
- Both have chemical bonds.
- But two different types of molecules are present.

✔ Classification: Mixture
> Reason: Two different compounds (TSq₄ and TSq) are present, not chemically combined.

---

✔ Final Classifications:

| Box | Contents | Classification |
|-----|---------|----------------|
| 1 | R (8 atoms) | Element |
| 2 | T, RSq, R | Mixture |
| 3 | Triangles (T) | Element |
| 4 | R₂, RSq, free atoms | Mixture |
| 5 | RSq molecules | Compound |
| 6 | Sq₂ molecules | Element |
| 7 | R, Sq₂, RSq | Mixture |
| 8 | TSq₄ & TSq | Mixture |

---

🔍 Summary of Key Concepts:

- Element: Made of only one type of atom (e.g., R, T, Sq₂).
- Compound: Two or more atoms chemically bonded in fixed ratios (e.g., RSq, TSq₄).
- Mixture: Two or more substances physically combined, not chemically bonded (can be elements or compounds).

---

✔ Answer to the Task:

Fill in the "?" boxes with the correct classification:

- Top right (?): Element
- Bottom left (?): Mixture
- Bottom middle (?): Mixture
- Bottom right (?): Mixture

And label the others accordingly.

---

Let me know if you'd like a version with labels filled in!