Elements, Compounds Mixtures Worksheet 3A | PDF | Mixture ... - Free Printable

Problem Analysis:

The task consists of two parts:
1. Classifying substances as elements (E), compounds (C), homogeneous mixtures (S), heterogeneous mixtures (HM), or none of these (X).
2. Matching diagrams with their correct descriptions.

Let's solve each part step by step.

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Part 1: Classification of Substances

#### Definitions:
- Element (E): A substance that cannot be broken down into simpler substances by chemical means. Examples: Carbon (C), Oxygen (O₂), Iron (Fe).
- Compound (C): A substance composed of two or more different elements chemically bonded together. Examples: Water (H₂O), Carbon Dioxide (CO₂), Sodium Chloride (NaCl).
- Homogeneous Mixture (S): A mixture with a uniform composition throughout, where the components are evenly distributed. Examples: Salt water, Air.
- Heterogeneous Mixture (HM): A mixture with non-uniform composition, where the components are not evenly distributed. Examples: Pail of garbage, Popcorn and seeds.
- None of These (X): Substances that do not fit into any of the above categories, such as abstract concepts or living things.

#### Classification of Each Substance:

1. Diamond: Pure carbon (C). Classification: E
2. Sugar (C₆H₁₂O₆): A compound made of carbon, hydrogen, and oxygen. Classification: C
3. Milk: A complex mixture of various substances (proteins, fats, sugars, etc.). Classification: HM
4. Air: A mixture of gases (oxygen, nitrogen, carbon dioxide, etc.). Classification: S
5. Sulfuric Acid (H₂SO₄): A compound made of hydrogen, sulfur, and oxygen. Classification: C
6. Gasoline: A mixture of hydrocarbons. Classification: S
7. Krypton (Kr): A noble gas element. Classification: E
8. Bismuth (Bi): A metal element. Classification: E
9. Uranium (U): A radioactive metal element. Classification: E
10. Water (H₂O): A compound made of hydrogen and oxygen. Classification: C
11. Alcohol (CH₃OH): A compound made of carbon, hydrogen, oxygen, and sometimes other elements. Classification: C
12. Pail of Garbage: A mixture of various unrelated materials. Classification: HM
13. Ammonia (NH₃): A compound made of nitrogen and hydrogen. Classification: C
14. Salt (NaCl): A compound made of sodium and chlorine. Classification: C
15. Noodle Soup: A mixture of noodles, broth, and other ingredients. Classification: HM
16. Wood: A complex mixture of cellulose, lignin, and other organic compounds. Classification: HM
17. Salt Water: A homogeneous mixture of salt (NaCl) dissolved in water. Classification: S
18. Ink: A mixture of pigments and solvents. Classification: S
19. Dry Ice (CO₂): A compound made of carbon and oxygen. Classification: C
20. Baking Soda (NaHCO₃): A compound made of sodium, hydrogen, carbon, and oxygen. Classification: C
21. Titanium (Ti): A metal element. Classification: E
22. Iron (Fe): A metal element. Classification: E
23. Popcorn and Seeds: A mixture of popcorn and seeds, which are not uniformly distributed. Classification: HM
24. Gold (Au): A metal element. Classification: E
25. Book: Not a chemical substance; it is an object. Classification: X
26. A dog: Living organisms are not classified as elements, compounds, or mixtures. Classification: X
27. Concrete: A mixture of cement, sand, gravel, and water. Classification: HM

#### Final Classification:
| Substance | Classification |
|-------------------------|----------------|
| Diamond | E |
| Sugar (C₆H₁₂O₆) | C |
| Milk | HM |
| Air | S |
| Sulfuric Acid (H₂SO₄) | C |
| Gasoline | S |
| Krypton (Kr) | E |
| Bismuth (Bi) | E |
| Uranium (U) | E |
| Water (H₂O) | C |
| Alcohol (CH₃OH) | C |
| Pail of Garbage | HM |
| Ammonia (NH₃) | C |
| Salt (NaCl) | C |
| Noodle Soup | HM |
| Wood | HM |
| Salt Water | S |
| Ink | S |
| Dry Ice (CO₂) | C |
| Baking Soda (NaHCO₃) | C |
| Titanium (Ti) | E |
| Iron (Fe) | E |
| Popcorn and seeds | HM |
| Gold (Au) | E |
| Book | X |
| A dog | X |
| Concrete | HM |

---

Part 2: Matching Diagrams with Descriptions

#### Diagram Analysis:
Each diagram represents a collection of atoms or molecules. We need to match them with the given descriptions based on their structure.

1. Pure Element – only one type of atom present.
- This means all the atoms in the diagram are identical.
- Diagram C: All atoms are the same (represented by circles).

2. Mixture of two elements – two types of uncombined atoms present.
- This means there are two different types of atoms, but they are not bonded together.
- Diagram E: Two different types of atoms (circles and dots) are present but not bonded.

3. Pure compound – only one type of compound present.
- This means all the molecules in the diagram are identical and consist of multiple types of atoms bonded together.
- Diagram A: All molecules are the same (e.g., two black atoms and one white atom).

4. Mixture of two compounds – two types of compounds present.
- This means there are two different types of molecules, each consisting of multiple types of atoms bonded together.
- Diagram B: Two different types of molecules are present (e.g., one molecule has two black atoms and one white atom, while another has one black atom and two white atoms).

5. Mixture of a compound and an element.
- This means there is a compound (molecules with multiple types of atoms bonded together) and an element (unbonded atoms of the same type).
- Diagram D: One type of molecule (black and white atoms bonded) and one type of unbonded atom (black).

#### Final Matching:
| Description | Diagram |
|--------------------------------------------------|---------|
| Pure Element – only one type of atom present. | C |
| Mixture of two elements – two types of uncombined atoms present. | E |
| Pure compound – only one type of compound present. | A |
| Mixture of two compounds – two types of compounds present. | B |
| Mixture of a compound and an element. | D |

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Final Answer:

1. Classification Table:
```
| Diamond | E |
| Sugar (C₆H₁₂O₆) | C |
| Milk | HM |
| Air | S |
| Sulfuric Acid (H₂SO₄) | C |
| Gasoline | S |
| Krypton (Kr) | E |
| Bismuth (Bi) | E |
| Uranium (U) | E |
| Water (H₂O) | C |
| Alcohol (CH₃OH) | C |
| Pail of Garbage | HM |
| Ammonia (NH₃) | C |
| Salt (NaCl) | C |
| Noodle Soup | HM |
| Wood | HM |
| Salt Water | S |
| Ink | S |
| Dry Ice (CO₂) | C |
| Baking Soda (NaHCO₃) | C |
| Titanium (Ti) | E |
| Iron (Fe) | E |
| Popcorn and seeds | HM |
| Gold (Au) | E |
| Book | X |
| A dog | X |
| Concrete | HM |
```

2. Diagram Matching:
```
| Description | Diagram |
|--------------------------------------------------|---------|
| Pure Element – only one type of atom present. | C |
| Mixture of two elements – two types of uncombined atoms present. | E |
| Pure compound – only one type of compound present. | A |
| Mixture of two compounds – two types of compounds present. | B |
| Mixture of a compound and an element. | D |
```

Boxed Final Answer:
\boxed{
\begin{array}{l}
\text{1. Classification Table:} \\
\text{| Diamond | E |} \\
\text{| Sugar (C₆H₁₂O₆) | C |} \\
\text{| Milk | HM |} \\
\text{| Air | S |} \\
\text{| Sulfuric Acid (H₂SO₄) | C |} \\
\text{| Gasoline | S |} \\
\text{| Krypton (Kr) | E |} \\
\text{| Bismuth (Bi) | E |} \\
\text{| Uranium (U) | E |} \\
\text{| Water (H₂O) | C |} \\
\text{| Alcohol (CH₃OH) | C |} \\
\text{| Pail of Garbage | HM |} \\
\text{| Ammonia (NH₃) | C |} \\
\text{| Salt (NaCl) | C |} \\
\text{| Noodle Soup | HM |} \\
\text{| Wood | HM |} \\
\text{| Salt Water | S |} \\
\text{| Ink | S |} \\
\text{| Dry Ice (CO₂) | C |} \\
\text{| Baking Soda (NaHCO₃) | C |} \\
\text{| Titanium (Ti) | E |} \\
\text{| Iron (Fe) | E |} \\
\text{| Popcorn and seeds | HM |} \\
\text{| Gold (Au) | E |} \\
\text{| Book | X |} \\
\text{| A dog | X |} \\
\text{| Concrete | HM |} \\
\\
\text{2. Diagram Matching:} \\
\text{| Pure Element – only one type of atom present. | C |} \\
\text{| Mixture of two elements – two types of uncombined atoms present. | E |} \\
\text{| Pure compound – only one type of compound present. | A |} \\
\text{| Mixture of two compounds – two types of compounds present. | B |} \\
\text{| Mixture of a compound and an element. | D |} \\
\end{array}
}