Grade 9 Chemistry Final Examination Study Guide
Section 1: The Periodic Table
Key Concepts:

Structure of the Periodic Table (Groups, Periods)

Metals, Non-metals, and Metalloids

Atomic Number and Mass Number

Periodic Trends (Electronegativity, Atomic Radius, Ionization Energy)
Questions:
Multiple Choice:
1. What is the atomic number of Carbon?
a) 6
b) 12
c) 14
d) 8
2. Which element is a metalloid?
a) Oxygen
b) Silicon
c) Iron
d) Neon
Fill in the Blanks:
3. Elements in the same group have the same number of ________.
4. The ________ of an element is the number of protons in its nucleus.
Match Column A with Column B:
Column A
Column B
1. Alkali Metals
a. Group 17
2. Halogens
b. Group 1
3. Noble Gases
c. Group 18
4. Transition Metals
d. Groups 3-12
Section 2: Naming of Anions and Cations
Key Concepts:

Common cations and anions

Rules for naming ionic compounds

Polyatomic ions
Questions:
Multiple Choice:
1. What is the charge on a sodium ion (Na⁺)?
a) 1+
b) 2+
c) 1d) 22. Which of the following is a common anion?
a) Na⁺
b) Cl⁻
c) K⁺
d) Mg²⁺
Fill in the Blanks:
3. The ion formed by chlorine is called a ________.
4.A positively charged ion is called a ________.
Match Column A with Column B:
Column A
Column B
1. SO₄²⁻
a. Nitrate
2. NO₃⁻
b. Sulfate
3. PO₄³⁻
c. Carbonate
4. CO₃²⁻
d. Phosphate
Section 3: Naming and Writing Chemical Formulas
Key Concepts:

Writing formulas for ionic and covalent compounds

Naming ionic and covalent compounds

Using prefixes for covalent compounds
Questions:
Multiple Choice:
1. What is the chemical formula for water?
a) H₂O
b) HO₂
c) H₂O₂
d) H₂
2. What is the name of the compound with the formula CO₂?
a) Carbon monoxide
b) Carbon dioxide
c) Carbon trioxide
d) Carbonate
Fill in the Blanks:
3. The chemical formula for sodium chloride is ________.
4. The compound N₂O₅ is named ________.
Match Column A with Column B:
Column A
Column B
1. H₂SO₄
a. Carbon monoxide
2. CO
b. Sodium bicarbonate
3. NaHCO₃
c. Sulfuric acid
4. H₂O₂
d. Hydrogen peroxide
Section 4: Balancing Chemical Reactions
Key Concepts:

Law of Conservation of Mass

Steps to balance chemical equations
Questions:
Multiple Choice:
1. In the reaction: 2H₂ + O₂ → 2H₂O, what is the coefficient of O₂?
a) 1
b) 2
c) 3
d) 4
2. What is the first step in balancing a chemical equation?
a) Write the products
b) Write the reactants
c) Count the number of atoms of each element
d) Add coefficients
Fill in the Blanks:
3. In a balanced chemical equation, the number of ________ of each element must be
the same on both sides.
4. The equation for the reaction between hydrogen and oxygen to form water is
________.
Match Column A with Column B:
Column A
Column B
1. H₂ + Cl₂ → 2HCl
a. Combustion
2. 2Mg + O₂ → 2MgO
b. Synthesis
3. 2H₂O₂ → 2H₂O + O₂
c. Decomposition
4. CH₄ + 2O₂ → CO₂ + 2H₂O
d. Single Replacement
Section 5: Types of Reactions
Key Concepts:

Synthesis, Decomposition, Single Replacement, Double Replacement,
Combustion
Questions:
Multiple Choice:
1. What type of reaction is: 2H₂ + O₂ → 2H₂O?
a) Decomposition
b) Synthesis
c) Single Replacement
d) Combustion
2. Which reaction type involves one element replacing another in a compound?
a) Double Replacement
b) Synthesis
c) Single Replacement
d) Decomposition
Fill in the Blanks:
3. A ________ reaction involves two compounds exchanging ions.
4. The reaction type where a compound breaks down into simpler substances is
called a ________ reaction.
Match Column A with Column B:
Column A
Column B
1. 2Na + Cl₂ → 2NaCl
a. Single Replacement
2. 2HgO → 2Hg + O₂
b. Double Replacement
3. 2KBr + BaCl₂ → 2KCl + BaBr₂
c. Decomposition
4. Zn + 2HCl → ZnCl₂ + H₂
d. Synthesis
Balancing Chemical Equations Exercise
Instructions: Balance the following chemical equations. Make sure that the number
of atoms for each element is the same on both sides of the equation.
1. ___ H₂ + ___ O₂ → ___ H₂O
2. ___ Na + ___ Cl₂ → ___ NaCl
3. ___ N₂ + ___ H₂ → ___ NH₃
4. ___ C₆H₁₂O₆ + ___ O₂ → ___ CO₂ + ___ H₂O
5. ___ Fe + ___ O₂ → ___ Fe₂O₃
6. ___ CH₄ + ___ O₂ → ___ CO₂ + ___ H₂O
7. ___ P + ___ O₂ → ___ P₂O₅
8. ___ KClO₃ → ___ KCl + ___ O₂
9. ___ Al + ___ HCl → ___ AlCl₃ + ___ H₂
10. ___ C₃H₈ + ___ O₂ → ___ CO₂ + ___ H₂O
Types of Chemical Reactions
Instructions
For each of the following chemical equations, identify the type of reaction. Write the
type of reaction in the space provided.
Part A: Identify the Reaction Types
1.
H2+Cl2→2HCl
Type of reaction: ___________________
2.
2H2O2→2H2O+O2
Type of reaction: ___________________
3.
Na2CO3+2HCl→2NaCl+H2O+CO2
Type of reaction: ___________________
4.
2KClO3→2KCl+3O2
Type of reaction: ___________________
5.
Fe+CuSO4→FeSO4+Cu
Type of reaction: ___________________
6.
CH4+2O2→CO2+2H2O
Type of reaction: ___________________
7.
AgNO3+NaCl→AgCl+NaNO3
Type of reaction: ___________________
8.
2H2+O2→2H2O
Type of reaction: ___________________
Part B: Reaction Completion and Type Identification
Complete the following reactions and identify the type of reaction.
1.
Mg+O2→
Complete reaction: ___________________
Type of reaction: ___________________
2.
CaCO3→
Complete reaction: ___________________
Type of reaction: ___________________
3.
Zn+HCl→
Complete reaction: ___________________
Type of reaction: ___________________
4.
NaOH+H2SO4→
Complete reaction: ___________________
Type of reaction: ___________________
Answer Key
Section 1: The Periodic Table
Multiple Choice:
1. a) 6
2. b) Silicon
Fill in the Blanks: 3. valence electrons
4. atomic number
Match Column A with Column B: 1-b, 2-a, 3-c, 4-d
Section 2: Naming of Anions and Cations
Multiple Choice:
1. a) 1+
2. b) Cl⁻
Fill in the Blanks: 3. chloride
4. cation
Match Column A with Column B: 1-b, 2-a, 3-d, 4-c
Section 3: Naming and Writing Chemical Formulas
Multiple Choice:
1. a) H₂O
2. b) Carbon dioxide
Fill in the Blanks: 3. NaCl
4. dinitrogen pentoxide
Match Column A with Column B: 1-c, 2-a, 3-b, 4-d
Section 4: Balancing Chemical Reactions
Multiple Choice:
1. a) 1
2. c) Count the number of atoms of each element
Fill in the Blanks: 3. atoms
4. 2H₂ + O₂ → 2H₂O
Match Column A with Column B: 1-b, 2-b, 3-c, 4-a
Section 5: Types of Reactions
Multiple Choice:
1. b) Synthesis
2. c) Single Replacement
Fill in the Blanks: 3. double replacement
4. decomposition
Match Column A with Column B: 1-d, 2-c, 3-b, 4-a
This study guide covers the fundamental concepts and types of questions you may
encounter on your final exam. Good luck with your studies!
Balancing equations Exercise
1. 2 H₂ + 1 O₂ → 2 H₂O
2. 2 Na + 1 Cl₂ → 2 NaCl
3. 1 N₂ + 3 H₂ → 2 NH₃
4. 1 C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O
5. 4 Fe + 3 O₂ → 2 Fe₂O₃
6. 1 CH₄ + 2 O₂ → 1 CO₂ + 2 H₂O
7. 4 P + 5 O₂ → 2 P₂O₅
8. 2 KClO₃ → 2 KCl + 3 O₂
9. 2 Al + 6 HCl → 2 AlCl₃ + 3 H₂
10. 1 C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O
Part A: Identify the Reaction Types
1.
H2+Cl2→2HCl
Type of reaction: Combination (Synthesis)
2.
2H2O2→2H2O+O2
Type of reaction: Decomposition
3.
Na2CO3+2HCl→2NaCl+H2O+CO2
Type of reaction: Double Replacement
4.
2KClO3→2KCl+3O2
Type of reaction: Decomposition
5.
Fe+CuSO4→FeSO4+Cu
Type of reaction: Single Replacement
6.
CH4+2O2→CO2+2H2O
Type of reaction: Combustion
7.
AgNO3+NaCl→AgCl+NaNO3
Type of reaction: Double Replacement
8.
2H2+O2→2H2O
Type of reaction: Combination (Synthesis)
Part B: Reaction Completion and Type Identification
1.
Mg+O2→2MgO
Type of reaction: Combination (Synthesis)
2.
CaCO3→CaO+CO2
Type of reaction: Decomposition
3.
Zn+2HCl→ZnCl2+H2
Type of reaction: Single Replacement
4.
2NaOH+H2SO4→Na2SO4+2H2O
Type of reaction: Double Replacement