CHEM120 – Introduction to General,
Organic & Biological Chemistry |
Chamberlain University | Exam 3 (2025/2026
Update) | Verified Questions & Answers |
100% Correct | Grade A
This study guide for Chamberlain College's Chem120 course provides 50 verified
multiple-choice questions (7-8 per topic) with 100% correct answers and detailed rationales,
aligned with 2025/2026 curriculum updates from the American Chemical Society (ACS) and NIH
biochemistry standards. Questions emphasize foundational principles for healthcare
applications, such as drug metabolism, acid-base balance in physiology, and biomolecular
interactions. Use for mastery of concepts, with rationales including clinical ties to
nursing/pharmacy. Each question has four options (A–D), the correct answer, and a rationale
with implications for biological systems.
Topic 1: Atomic Structure and Periodic Trends (Questions 1–7)
Question 1: The atomic number of an element represents the number of:
A. Neutrons in the nucleus
B. Protons in the nucleus
C. Electrons in the outer shell
D. Isotopes of the element
Correct Answer: B
Rationale: The atomic number (Z) equals the number of protons, defining the element's identity
and electron configuration (ACS 2025 atomic model). Implication: In healthcare, Z determines
isotope use in PET scans for cancer imaging, ensuring targeted radiation delivery.
Question 2: According to the periodic table trends, atomic radius increases:
A. From left to right across a period
B. From top to bottom down a group
C. In noble gases only
D. In halogens only
Correct Answer: B
, Rationale: Increased electron shells and shielding effect down a group (2025 IUPAC periodic
trends). Implication: Larger radii in alkali metals explain reactivity in electrolyte solutions, relevant
for IV fluid compatibility in nursing.
Question 3: Electronegativity increases:
A. Down a group
B. Across a period from left to right
C. In s-block elements
D. In transition metals only
Correct Answer: B
Rationale: Higher effective nuclear charge pulls electrons closer (2025 ACS). Implication:
Influences polar bonds in biomolecules like DNA (O more electronegative than C), affecting drug
polarity and absorption in pharmacokinetics.
Question 4: The Pauli exclusion principle states that no two electrons in an atom can have:
A. The same energy level
B. The same four quantum numbers
C. The same spin only
D. The same orbital shape
Correct Answer: B
Rationale: Limits 2 electrons per orbital (2025 quantum mechanics update). Implication: Dictates
electron configuration in hemoglobin (Fe2+), enabling O2 binding without repulsion.
Question 5: Ionization energy generally decreases:
A. Across a period
B. Down a group
C. In nonmetals
D. In metalloids
Correct Answer: B
Rationale: Larger atomic size eases valence electron removal (2025 periodic trends).
Implication: Explains alkali metal reactivity in saline solutions, critical for electrolyte balance in
hypokalemia treatment.
Question 6: The Aufbau principle fills orbitals in order of:
A. Highest to lowest energy
B. Lowest to highest energy
C. Random sequence
D. Shell number only
Correct Answer: B
Rationale: 1s < 2s < 2p < 3s, etc. (2025 quantum). Implication: Predicts stability in ions like Na+
(loses 1e-), used in IV fluids for osmotic balance.
Organic & Biological Chemistry |
Chamberlain University | Exam 3 (2025/2026
Update) | Verified Questions & Answers |
100% Correct | Grade A
This study guide for Chamberlain College's Chem120 course provides 50 verified
multiple-choice questions (7-8 per topic) with 100% correct answers and detailed rationales,
aligned with 2025/2026 curriculum updates from the American Chemical Society (ACS) and NIH
biochemistry standards. Questions emphasize foundational principles for healthcare
applications, such as drug metabolism, acid-base balance in physiology, and biomolecular
interactions. Use for mastery of concepts, with rationales including clinical ties to
nursing/pharmacy. Each question has four options (A–D), the correct answer, and a rationale
with implications for biological systems.
Topic 1: Atomic Structure and Periodic Trends (Questions 1–7)
Question 1: The atomic number of an element represents the number of:
A. Neutrons in the nucleus
B. Protons in the nucleus
C. Electrons in the outer shell
D. Isotopes of the element
Correct Answer: B
Rationale: The atomic number (Z) equals the number of protons, defining the element's identity
and electron configuration (ACS 2025 atomic model). Implication: In healthcare, Z determines
isotope use in PET scans for cancer imaging, ensuring targeted radiation delivery.
Question 2: According to the periodic table trends, atomic radius increases:
A. From left to right across a period
B. From top to bottom down a group
C. In noble gases only
D. In halogens only
Correct Answer: B
, Rationale: Increased electron shells and shielding effect down a group (2025 IUPAC periodic
trends). Implication: Larger radii in alkali metals explain reactivity in electrolyte solutions, relevant
for IV fluid compatibility in nursing.
Question 3: Electronegativity increases:
A. Down a group
B. Across a period from left to right
C. In s-block elements
D. In transition metals only
Correct Answer: B
Rationale: Higher effective nuclear charge pulls electrons closer (2025 ACS). Implication:
Influences polar bonds in biomolecules like DNA (O more electronegative than C), affecting drug
polarity and absorption in pharmacokinetics.
Question 4: The Pauli exclusion principle states that no two electrons in an atom can have:
A. The same energy level
B. The same four quantum numbers
C. The same spin only
D. The same orbital shape
Correct Answer: B
Rationale: Limits 2 electrons per orbital (2025 quantum mechanics update). Implication: Dictates
electron configuration in hemoglobin (Fe2+), enabling O2 binding without repulsion.
Question 5: Ionization energy generally decreases:
A. Across a period
B. Down a group
C. In nonmetals
D. In metalloids
Correct Answer: B
Rationale: Larger atomic size eases valence electron removal (2025 periodic trends).
Implication: Explains alkali metal reactivity in saline solutions, critical for electrolyte balance in
hypokalemia treatment.
Question 6: The Aufbau principle fills orbitals in order of:
A. Highest to lowest energy
B. Lowest to highest energy
C. Random sequence
D. Shell number only
Correct Answer: B
Rationale: 1s < 2s < 2p < 3s, etc. (2025 quantum). Implication: Predicts stability in ions like Na+
(loses 1e-), used in IV fluids for osmotic balance.
