Part 1: Atomic Structure Fundamentals

1. Circle the THREE main parts of an atom:

Protons

Electrons

Neutrons

Molecules

Compounds

2. Which part of the atom has a positive charge?

Protons

Electrons

Neutrons

Nucleus

3. Fill in the blanks about atomic structure:

The ____________ is the centre of the atom and contains ____________ and ____________. The ____________ orbit around the nucleus and have a ____________ charge.

Part 2: Molecules and Chemical Formulas

4. What is the difference between an atom and a molecule?

5. Match each molecular formula with its correct name:

1. H₂O

2. CO₂

3. CH₄

4. O₂

A. Methane

B. Water

C. Oxygen gas

D. Carbon dioxide

6. How many atoms are in each molecule? Fill in the table:

H₂O: _____ hydrogen atoms, _____ oxygen atom = _____ total atoms

CO₂: _____ carbon atom, _____ oxygen atoms = _____ total atoms

CH₄: _____ carbon atom, _____ hydrogen atoms = _____ total atoms

Part 3: Molymod Model Observations

7. Draw the molecular models you built using the Molymod kits:

Water (H₂O):

Carbon dioxide (CO₂):

Methane (CH₄):

8. What did you notice about the shape of different molecules?

9. Which colours represented which elements in your Molymod kit?

Hydrogen: ____________

Carbon: ____________

Oxygen: ____________

Part 4: Chemical Bonding

10. What type of bond forms when atoms share electrons?

Ionic bond

Covalent bond

Metallic bond

Hydrogen bond

11. Explain how atoms combine to form molecules:

12. Circle all the statements that are TRUE about covalent bonds:

Electrons are shared between atoms

They form between non-metal atoms

They create molecules

Electrons are transferred from one atom to another

They are found in water molecules

Part 5: Real-World Applications

13. Give THREE examples of molecules you encounter in everyday life and write their chemical formulas:

1. ____________ (____________)

2. ____________ (____________)

3. ____________ (____________)

14. Why is it important to understand molecular structure?

15. Extension Challenge: Predict the molecular formula for ammonia if it contains 1 nitrogen atom and 3 hydrogen atoms:

Atomic Structure Molecular Models

Atomic Structure Molecular Models

Part 1: Atomic Structure Fundamentals

Part 2: Molecules and Chemical Formulas

Part 3: Molymod Model Observations

Part 4: Chemical Bonding

Part 5: Real-World Applications

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