Classifying matter worksheet with substances to classify as homogeneous mixtures, heterogeneous mixtures, elements, or compounds.

It looks like you've uploaded a worksheet titled "2.1 Classifying Matter Worksheet", which asks students to classify various substances as homogeneous mixture, heterogeneous mixture, element, or compound. Additionally, it requests a reason for each classification.

Since I can't view images directly, I’ll help you solve the worksheet based on typical content found in such exercises. Below is a completed version of the worksheet with explanations for each item:

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2.1 Classifying Matter Worksheet

| MATTER | Homogeneous, Heterogeneous, Element, or Compound | REASON |
|-----------|------------------------------------------------------|------------|
| 1. Sodium metal (Na) | Element | Sodium is a pure substance made of only one type of atom. |
| 2. Tint | Homogeneous mixture | Tint is a uniform blend of dye in a solvent (like water), evenly distributed. |
| 3. Oxygen gas (O₂) | Element | Oxygen gas consists of two oxygen atoms bonded together; it's a diatomic molecule of a single element. |
| 4. Fruit salad | Heterogeneous mixture | The components (fruits) are not uniformly distributed and can be seen separately. |
| 5. Apple juice | Homogeneous mixture | If no pulp, apple juice is uniform throughout (assuming filtered). |
| 6. Vinegar (CH₃COOH) | Compound | Acetic acid (CH₃COOH) is a chemical compound made of carbon, hydrogen, and oxygen atoms chemically bonded. |
| 7. Air | Homogeneous mixture | Air is a uniform mixture of gases (mostly nitrogen and oxygen). |
| 8. Pure iron | Element | Iron is a pure substance composed solely of iron atoms. |
| 9. Rock salt | Heterogeneous mixture | Rock salt contains visible impurities and minerals mixed unevenly. |
| 10. Table salt (NaCl) | Compound | Sodium chloride is a chemical compound formed from sodium and chlorine. |
| 11. Steel | Homogeneous mixture | Steel is an alloy of iron and carbon, uniformly mixed at the atomic level. |
| 12. Hot chocolate with marshmallows | Heterogeneous mixture | Marshmallows are not uniformly distributed and can be seen as distinct parts. |
| 13. Nitrogen gas (N₂) | Element | Nitrogen gas is made of two nitrogen atoms bonded together — a diatomic molecule of a single element. |
| 14. Distilled water (H₂O) | Compound | Water is a chemical compound made of hydrogen and oxygen atoms bonded together. |
| 15. Coffee | Homogeneous mixture | Assuming it's brewed and stirred well, coffee is uniform in composition. |
| 16. Silver (Ag) | Element | Silver is a pure substance made of silver atoms. |
| 17. Ethanol (C₂H₅OH) | Compound | Ethanol is a chemical compound made of carbon, hydrogen, and oxygen. |
| 18. Vegetable soup | Heterogeneous mixture | Contains various ingredients (vegetables, broth) that are not uniformly mixed. |
| 19. Chocolate milk | Homogeneous mixture | When well-mixed, chocolate milk appears uniform, though technically a colloid. |
| 20. Gold (Au) | Element | Gold is a pure substance made of gold atoms. |

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🔍 Key Definitions:

- Element: A pure substance made of only one type of atom (e.g., Na, O₂).
- Compound: A pure substance made of two or more elements chemically combined in fixed proportions (e.g., H₂O, NaCl).
- Homogeneous Mixture: A mixture with uniform composition throughout (e.g., air, vinegar).
- Heterogeneous Mixture: A mixture where components are not uniformly distributed (e.g., fruit salad, rock salt).

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