🔬 Part 1: Understanding the Basics

1. Which of the following best describes an atom?

The smallest unit of matter that retains the properties of an element

Two or more atoms bonded together

A substance made of different types of atoms

A charged particle

2. A molecule is:

Always made of different types of atoms

Two or more atoms bonded together

Only found in living things

The same as a compound

3. What makes a compound different from a molecule?

Compounds are always larger than molecules

Compounds contain atoms of different elements bonded together

Compounds cannot be broken down

There is no difference

4. Which of these examples represent molecules? (Check all that apply)

O₂ (oxygen gas)

H₂O (water)

He (helium atom)

CO₂ (carbon dioxide)

🧪 Part 2: Classification Challenge

5. Classify each example below. Write "Atom," "Molecule," or "Compound" in the blank.

a) A single carbon atom (C): _______________

b) Nitrogen gas (N₂): _______________

c) Table salt (NaCl): _______________

d) A single gold atom (Au): _______________

e) Methane gas (CH₄): _______________

6. Explain the difference between H₂ and H₂O using the terms atom, molecule, and compound.

7. True or False: All compounds are molecules, but not all molecules are compounds. Explain your answer.

🎯 Part 3: Apply Your Knowledge

8. Look at the formula CO₂. Answer the following:

a) How many different types of atoms are present? ___________

b) How many total atoms are in one molecule? ___________

c) Is this an atom, molecule, or compound? ___________

9. Create your own example of each category below:

Atom: ___________

Molecule (same element): ___________

Compound: ___________

10. In your own words, complete this analogy: "Atoms are like letters, molecules are like __________, and compounds are like __________."

Atoms, Molecules, and Compounds

Atoms, Molecules, and Compounds

🔬 Part 1: Understanding the Basics

🧪 Part 2: Classification Challenge

🎯 Part 3: Apply Your Knowledge

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