UNIVERSITY OF RHODE ISLAND CHEMISTRY 1 FINAL EXAM PRACTICE TEST – EXAM
PRACTICE QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF
*CORE DOMAINS*
Atomic Structure and Periodic Trends
Chemical Bonding and Molecular Geometry
Stoichiometry and Chemical Reactions
Gases and Gas Laws
Thermochemistry and Energy Changes
Solutions and Concentrations
Acids, Bases, and pH
Chemical Equilibrium (Introductory Concepts)
Lab Safety and Measurement Techniques
*INTRODUCTION*
, *Thi h i Ch i t 1 fi l
SECTION ONE: QUESTIONS 1–50
Question 1
Which subatomic particle determines the identity of an element?
A. Neutron
B. Electron
C. Proton
D. Positron
🟢 Correct Answer: C. Proton
🔴 Explanation: The number of protons (atomic number) defines the identity of an
element.
Question 2
Which law states that matter cannot be created or destroyed in a chemical reaction?
,A. Law of Multiple Proportions
B. Law of Conservation of Mass
C. Boyle’s Law
D. Charles’s Law
🟢 Correct Answer: B. Law of Conservation of Mass
🔴 Explanation: Mass remains constant during chemical reactions.
Question 3
What is the electron configuration of oxygen (Z = 8)?
A. 1s² 2s² 2p⁴
B. 1s² 2s² 2p⁶
C. 1s² 2s² 2p²
D. 1s² 2s¹ 2p⁵
🟢 Correct Answer: A. 1s² 2s² 2p⁴
🔴 Explanation: Oxygen has 8 electrons distributed in 1s, 2s, and 2p orbitals.
, Question 4
Which type of bond involves sharing electrons?
A. Ionic bond
B. Metallic bond
C. Covalent bond
D. Hydrogen bond
🟢 Correct Answer: C. Covalent bond
🔴 Explanation: Covalent bonds involve electron sharing between atoms.
Question 5
What is the molar mass of water (H₂O)?
A. 16 g/mol
B. 18 g/mol
C. 20 g/mol
D. 22 g/mol
🟢 Correct Answer: B. 18 g/mol
🔴 Explanation: 2(1) + 16 = 18 g/mol.
PRACTICE QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF
*CORE DOMAINS*
Atomic Structure and Periodic Trends
Chemical Bonding and Molecular Geometry
Stoichiometry and Chemical Reactions
Gases and Gas Laws
Thermochemistry and Energy Changes
Solutions and Concentrations
Acids, Bases, and pH
Chemical Equilibrium (Introductory Concepts)
Lab Safety and Measurement Techniques
*INTRODUCTION*
, *Thi h i Ch i t 1 fi l
SECTION ONE: QUESTIONS 1–50
Question 1
Which subatomic particle determines the identity of an element?
A. Neutron
B. Electron
C. Proton
D. Positron
🟢 Correct Answer: C. Proton
🔴 Explanation: The number of protons (atomic number) defines the identity of an
element.
Question 2
Which law states that matter cannot be created or destroyed in a chemical reaction?
,A. Law of Multiple Proportions
B. Law of Conservation of Mass
C. Boyle’s Law
D. Charles’s Law
🟢 Correct Answer: B. Law of Conservation of Mass
🔴 Explanation: Mass remains constant during chemical reactions.
Question 3
What is the electron configuration of oxygen (Z = 8)?
A. 1s² 2s² 2p⁴
B. 1s² 2s² 2p⁶
C. 1s² 2s² 2p²
D. 1s² 2s¹ 2p⁵
🟢 Correct Answer: A. 1s² 2s² 2p⁴
🔴 Explanation: Oxygen has 8 electrons distributed in 1s, 2s, and 2p orbitals.
, Question 4
Which type of bond involves sharing electrons?
A. Ionic bond
B. Metallic bond
C. Covalent bond
D. Hydrogen bond
🟢 Correct Answer: C. Covalent bond
🔴 Explanation: Covalent bonds involve electron sharing between atoms.
Question 5
What is the molar mass of water (H₂O)?
A. 16 g/mol
B. 18 g/mol
C. 20 g/mol
D. 22 g/mol
🟢 Correct Answer: B. 18 g/mol
🔴 Explanation: 2(1) + 16 = 18 g/mol.
