Compounds and Mixtures Worksheet | Home Learning | Beyond - Free Printable

Problem Analysis:

The task involves identifying and categorizing different illustrations based on their chemical composition. The goal is to match the given descriptions with the corresponding images (labeled A, B, C, D, or E) and then classify each item as an Atom, Element, Molecule, or Compound.

#### Given Descriptions:
1. A pure compound made up of 3 elements.
2. Allotropes of an element.
3. Molecules of 3 elements, both of which are made of atoms.
4. Molecules of an element.
5. A pure compound made up of 2 elements.

#### Categories:
- Atom
- Element
- Molecule
- Compound

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Step-by-Step Solution:

#### Step 1: Match the Descriptions with the Images

We need to analyze each image and determine which one corresponds to each description.

##### Image A:
- This image shows a single atom (e.g., a carbon atom with protons, neutrons, and electrons).
- Match: This does not fit any of the descriptions directly, as it is a single atom, not a compound or molecule.

##### Image B:
- This image shows two allotropes of carbon: diamond and graphite.
- Match: Description 2 ("Allotropes of an element") fits this image.

##### Image C:
- This image shows molecules of water (H₂O), which consist of 3 elements (hydrogen and oxygen).
- Match: Description 3 ("Molecules of 3 elements, both of which are made of atoms") fits this image.

##### Image D:
- This image shows molecules of oxygen (O₂), which are composed of only one element (oxygen).
- Match: Description 4 ("Molecules of an element") fits this image.

##### Image E:
- This image shows sodium chloride (NaCl), which is a compound made up of 2 elements (sodium and chlorine).
- Match: Description 5 ("A pure compound made up of 2 elements") fits this image.

##### Remaining Description:
- Description 1 ("A pure compound made up of 3 elements") does not match any of the provided images. This might be a mistake in the problem setup or an oversight.

#### Final Matches:
1. Not matched.
2. Image B: Allotropes of an element.
3. Image C: Molecules of 3 elements.
4. Image D: Molecules of an element.
5. Image E: A pure compound made up of 2 elements.

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#### Step 2: Classify Each Item

Now, we classify each item (Sugar, CO₂, NaCl, Water, and Iron) as either an Atom, Element, Molecule, or Compound.

##### Sugar (C₁₂H₂₂O₁₁):
- Sugar is a compound because it is made up of multiple elements (carbon, hydrogen, and oxygen) bonded together.
- Classification: Compound

##### CO₂ (Carbon Dioxide):
- CO₂ is a molecule because it consists of two types of atoms (carbon and oxygen) bonded together.
- Classification: Molecule

##### NaCl (Sodium Chloride):
- NaCl is a compound because it is made up of two elements (sodium and chlorine) bonded together.
- Classification: Compound

##### Water (H₂O):
- Water is a molecule because it consists of two types of atoms (hydrogen and oxygen) bonded together.
- Classification: Molecule

##### Iron (Fe):
- Iron is an element because it is composed of only one type of atom.
- Classification: Element

#### Final Classification:
- Sugar: Compound
- CO₂: Molecule
- NaCl: Compound
- Water: Molecule
- Iron: Element

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Additional Notes on Solutions, Solutes, and Solvents:

#### Definitions:
- Solvent: The substance that dissolves another substance (the solute) and is present in the larger quantity.
- Solute: The substance that is dissolved in the solvent and is present in the smaller quantity.
- Solution: A homogeneous mixture where the solute is uniformly distributed in the solvent.

#### Example:
- In a saltwater solution:
- Solvent: Water (H₂O)
- Solute: Salt (NaCl)
- Solution: Saltwater

#### Homogeneous vs. Heterogeneous Mixtures:
- Homogeneous Mixture: Uniform composition throughout (e.g., saltwater, air).
- Heterogeneous Mixture: Non-uniform composition (e.g., sand and water, oil and water).

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Final Answer:

1. Matches:
- 2. Image B: Allotropes of an element.
- 3. Image C: Molecules of 3 elements.
- 4. Image D: Molecules of an element.
- 5. Image E: A pure compound made up of 2 elements.

2. Classifications:
- Sugar: Compound
- CO₂: Molecule
- NaCl: Compound
- Water: Molecule
- Iron: Element

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\boxed{\text{See detailed explanation above for matches and classifications.}}
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