AP Physics 2: Algebra-Based Practice Quiz: The Bohr Model of Atomic Structure
Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026
Test your understanding with short quizzes. This quiz has 10 questions to check your progress.
Question 1 of 10
All Questions (10)
A) Protons and neutrons
B) Protons and discrete energy states
C) Only protons
D) Neutrons and classical physics
Correct Answer: A
The text explicitly states, 'The nucleus of an atom is made up of protons and neutrons.'
A) The number of neutrons in its nucleus
B) The number of protons in its nucleus
C) The number of discrete energy states
D) Its basis in classical physics
Correct Answer: B
The content states, 'Each atomic element has a unique number of protons.' This implies the number of protons is the unique identifier.
A) Quantum mechanics
B) Nuclear physics
C) Classical physics
D) Relativistic physics
Correct Answer: C
The text specifies that 'The Bohr model of the atom is based on classical physics.'
A) the atomic nucleus.
B) protons and neutrons.
C) a unique elemental identity.
D) discrete energy states.
Correct Answer: D
The provided text highlights that the Bohr model 'led to the description of the hydrogen atom in terms of discrete energy states.'
A) Helium
B) All elements
C) Hydrogen
D) Any element with a nucleus
Correct Answer: C
The content explicitly mentions that the Bohr model led to 'the description of the hydrogen atom.'
A) An element is defined by the discrete energy states described by the Bohr model.
B) The number of protons within the nucleus, which also contains neutrons, uniquely defines an atomic element.
C) Classical physics dictates that the number of neutrons must equal the number of protons to define an element.
D) The nucleus of a hydrogen atom is unique because it was the first to be described by the Bohr model.
Correct Answer: B
This answer correctly synthesizes two points from the text: 'The nucleus of an atom is made up of protons and neutrons' and 'Each atomic element has a unique number of protons.' The other options introduce information not present in the text or make incorrect connections.
A) It is the current and most accurate model of the atom.
B) It was a historical representation that advanced the understanding of atomic structure.
C) It disproved the existence of protons and neutrons.
D) It is a model based entirely on modern quantum mechanics.
Correct Answer: B
The text identifies the Bohr model as 'the historical representation of the atom,' implying its role as a developmental step rather than the final, current model.
A) They must have a different number of neutrons.
B) They belong to different atomic elements.
C) One must be a hydrogen atom.
D) They exist in different discrete energy states.
Correct Answer: B
The text states, 'Each atomic element has a unique number of protons.' Therefore, if the number of protons is different, the atoms must be of different elements.
A) An atom's nucleus contains both protons and neutrons.
B) The Bohr model is relevant to the description of the hydrogen atom.
C) The number of neutrons is what makes each atomic element unique.
D) The Bohr model is based on principles of classical physics.
Correct Answer: C
The text explicitly states that the 'unique number of protons' defines an element, not the number of neutrons. The other statements are directly supported by the text.
A) A nucleus composed of protons and neutrons.
B) The principles of classical physics.
C) A unique number of protons.
D) Discrete energy states.
Correct Answer: D
The text directly links the Bohr model's description of hydrogen to the concept of 'discrete energy states.' While the model is based on classical physics (B), its descriptive output for the hydrogen atom was in terms of these states.