CHEMISTRY 130 ARIZONA COLLEGE OF NURSING MIDTERM EXAM AND STUDY GUIDE EXAMS COMPLETE
QUESTIONS AND ANSWERS ALREADY GRADED A+| 100% VERIFIED SOLUTIONS………...
Core Domains
Atomic Structure and Periodicity
Chemical Bonding and Molecular Structure
Stoichiometry and Chemical Calculations
Solutions, Concentrations, and Colligative Properties
Acids, Bases, and pH
Chemical Reactions and Equations
Organic Chemistry Fundamentals
Biochemistry Principles
Thermochemistry and Energy Changes
Gases, Liquids, and Solids
Introduction
,This comprehensive examination is designed to assess the knowledge and competencies required for Chemistry
130 at Arizona College of Nursing, as part of the foundational science curriculum for nursing students. The exam
evaluates understanding of atomic structure, chemical bonding, stoichiometry, solutions, acid-base chemistry,
organic chemistry, biochemistry, thermochemistry, and gas laws. Questions are structured as multiple-choice and
scenario-based items that require critical thinking, application of chemical principles, and sound analytical
reasoning. Emphasis is placed on real-world application, clinical relevance, and decision-making to ensure that
students can apply chemical principles to patient care and health sciences.
SECTION ONE: QUESTIONS 1–100
Question 1
An atom has 17 protons, 18 neutrons, and 17 electrons. What is the atomic number and mass number of this
atom?
A. Atomic number 17, mass number 18
B. Atomic number 17, mass number 35
C. Atomic number 18, mass number 35
D. Atomic number 35, mass number 17
🟢B
,🔴 RATIONALE: The atomic number is equal to the number of protons (17). The mass number is the sum of
protons and neutrons (17 + 18 = 35). Option A has the wrong mass number; option C has the wrong atomic
number; option D has both values reversed.
Question 2
Which of the following is the correct electron configuration for oxygen (atomic number 8)?
A. 1s² 2s² 2p⁴
B. 1s² 2s² 2p⁶
C. 1s² 2s² 2p²
D. 1s² 2s² 2p³
🟢A
🔴 RATIONALE: Oxygen has 8 electrons. The electron configuration is 1s² 2s² 2p⁴ (2 + 2 + 4 = 8 electrons).
Option B is for neon; option C is for carbon; option D is for nitrogen.
Question 3
Which type of chemical bond involves the sharing of electrons between atoms?
, A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Metallic bond
🟢B
🔴 RATIONALE: A covalent bond involves the sharing of electron pairs between atoms. Ionic bonds (A) involve
the transfer of electrons; hydrogen bonds (C) are weak intermolecular forces; metallic bonds (D) involve a "sea
of electrons."
Question 4
What is the pH of a solution with a hydrogen ion concentration [H⁺] of 1.0 × 10⁻⁵ M?
A. 3
B. 5
C. 7
D. 9
🟢B
🔴 RATIONALE: pH = -log[H⁺] = -log(1.0 × 10⁻⁵) = 5. A pH of 3 (A) would be more acidic; pH 7 (C) is neutral; pH
9 (D) is basic.
QUESTIONS AND ANSWERS ALREADY GRADED A+| 100% VERIFIED SOLUTIONS………...
Core Domains
Atomic Structure and Periodicity
Chemical Bonding and Molecular Structure
Stoichiometry and Chemical Calculations
Solutions, Concentrations, and Colligative Properties
Acids, Bases, and pH
Chemical Reactions and Equations
Organic Chemistry Fundamentals
Biochemistry Principles
Thermochemistry and Energy Changes
Gases, Liquids, and Solids
Introduction
,This comprehensive examination is designed to assess the knowledge and competencies required for Chemistry
130 at Arizona College of Nursing, as part of the foundational science curriculum for nursing students. The exam
evaluates understanding of atomic structure, chemical bonding, stoichiometry, solutions, acid-base chemistry,
organic chemistry, biochemistry, thermochemistry, and gas laws. Questions are structured as multiple-choice and
scenario-based items that require critical thinking, application of chemical principles, and sound analytical
reasoning. Emphasis is placed on real-world application, clinical relevance, and decision-making to ensure that
students can apply chemical principles to patient care and health sciences.
SECTION ONE: QUESTIONS 1–100
Question 1
An atom has 17 protons, 18 neutrons, and 17 electrons. What is the atomic number and mass number of this
atom?
A. Atomic number 17, mass number 18
B. Atomic number 17, mass number 35
C. Atomic number 18, mass number 35
D. Atomic number 35, mass number 17
🟢B
,🔴 RATIONALE: The atomic number is equal to the number of protons (17). The mass number is the sum of
protons and neutrons (17 + 18 = 35). Option A has the wrong mass number; option C has the wrong atomic
number; option D has both values reversed.
Question 2
Which of the following is the correct electron configuration for oxygen (atomic number 8)?
A. 1s² 2s² 2p⁴
B. 1s² 2s² 2p⁶
C. 1s² 2s² 2p²
D. 1s² 2s² 2p³
🟢A
🔴 RATIONALE: Oxygen has 8 electrons. The electron configuration is 1s² 2s² 2p⁴ (2 + 2 + 4 = 8 electrons).
Option B is for neon; option C is for carbon; option D is for nitrogen.
Question 3
Which type of chemical bond involves the sharing of electrons between atoms?
, A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Metallic bond
🟢B
🔴 RATIONALE: A covalent bond involves the sharing of electron pairs between atoms. Ionic bonds (A) involve
the transfer of electrons; hydrogen bonds (C) are weak intermolecular forces; metallic bonds (D) involve a "sea
of electrons."
Question 4
What is the pH of a solution with a hydrogen ion concentration [H⁺] of 1.0 × 10⁻⁵ M?
A. 3
B. 5
C. 7
D. 9
🟢B
🔴 RATIONALE: pH = -log[H⁺] = -log(1.0 × 10⁻⁵) = 5. A pH of 3 (A) would be more acidic; pH 7 (C) is neutral; pH
9 (D) is basic.
