📚 Part 1: Multiple Choice

1. What is valency?

The number of protons in an atom

The combining power of an element

The mass of an atom

The number of neutrons in an atom

2. How do atoms form positive ions?

By gaining electrons

By losing electrons

By sharing electrons

By gaining protons

3. Which type of bonding involves the sharing of electrons?

Ionic bonding

Covalent bonding

Metallic bonding

Hydrogen bonding

4. Which of the following are examples of ionic compounds? (Select all that apply)

NaCl (table salt)

H₂O (water)

MgO (magnesium oxide)

CO₂ (carbon dioxide)

5. Fill in the blank: Ionic bonds typically form between a ________ and a ________.

metal / non-metal

✏️ Part 2: Short Answer Questions

6. Explain the difference between ionic and covalent bonding. Include what happens to electrons in each type.

7. Sodium (Na) has 1 valence electron and chlorine (Cl) has 7 valence electrons. Explain how these atoms bond to form sodium chloride (NaCl).

8. Water (H₂O) is a covalent compound. Describe how the hydrogen and oxygen atoms share electrons to form this molecule.

9. Give two real-world examples of:

a) Ionic compounds: _________________ and _________________

b) Covalent compounds: _________________ and _________________

🎯 Part 3: Application and Analysis

10. Predict the type of bonding (ionic or covalent) for each compound and explain your reasoning:

a) CaF₂ (calcium fluoride): _________________
Reason: _________________________________________________

b) CH₄ (methane): _________________
Reason: _________________________________________________

11. Extension Challenge: Explain why ionic compounds like salt dissolve in water, but covalent compounds like oil do not.

12. Draw a simple diagram showing electron transfer in the formation of lithium fluoride (LiF). Label the ions formed.

Chemical Bonding Recap

Chemical Bonding Recap

📚 Part 1: Multiple Choice

✏️ Part 2: Short Answer Questions

🎯 Part 3: Application and Analysis

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