Question 1
An atom has 17 protons, 18 neutrons, and 17 electrons. Which description is correct?
Correct Answer:
It is a neutral chlorine atom with mass number 35.
Question 2
Which pair of atoms represents isotopes of the same element?
Correct Answer:
O-16 and O-18
Question 3
Which ground-state electron configuration represents a neutral magnesium atom?
Correct Answer:
1s2 2s2 2p6 3s2
Question 4
A sample emits alpha particles during radioactive decay. What change occurs in the nucleus of each decaying atom?
Correct Answer:
The atomic number decreases by 2 and the mass number decreases by 4.
Question 5
A hydrogen atom emits light when an electron falls from n = 4 to n = 2. Which statement best explains the emitted photon?
Correct Answer:
Its energy equals the difference between the two electron energy levels.
Question 1
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About this Exam

Prepare with the ORELA Chemistry (NT321) Practice Questions - Oregon Educator Licensure Assessments Chemistry (NT321) Exam practice quiz. This question bank includes 100 questions covering atom, solution, represents, element, and expected. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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ORELA Chemistry (NT321) Practice Questions - Oregon Educator Licensure Assessments Chemistry (NT321) Exam

This practice set contains 100 questions from the matching question bank and focuses on atom, solution, represents, element, and expected. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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