Question 1
An atom of carbon has an atomic number of 6 and a mass number of 14. Which statement accurately describes the subatomic composition of this carbon isotope (Carbon-14)?
Correct Answer:
It contains 6 protons, 8 neutrons, and 6 electrons.
Question 2
Naturally occurring chlorine exists as two stable isotopes: Chlorine-35 (atomic mass 34.97 amu, abundance 75.77%) and Chlorine-37 (atomic mass 36.97 amu, abundance 24.23%). What is the calculated average atomic mass of chlorine?
Correct Answer:
35.45 amu
Question 3
What is the ground-state electron configuration of a neutral nitrogen atom (atomic number 7)?
Correct Answer:
1s² 2s² 2p³
Question 4
An element has the noble-gas electron configuration [Ne] 3s² 3p⁴. Which element does this configuration represent, and how many valence electrons does it have?
Correct Answer:
Sulfur, with 6 valence electrons
Question 5
Which general trend best describes atomic radius as you move from left to right across Period 3 (Na to Cl) of the periodic table?
Correct Answer:
Atomic radius decreases because effective nuclear charge increases, pulling valence electrons closer.
Question 1
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Prepare with the RISE Science - Chemistry Practice Questions - RISE Science - Chemistry (Utah SEEd High School) Exam practice quiz. This question bank includes 100 questions covering atom, atomic, mass, many, and number. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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RISE Science - Chemistry Practice Questions - RISE Science - Chemistry (Utah SEEd High School) Exam

This practice set contains 100 questions from the matching question bank and focuses on atom, atomic, mass, many, and number. 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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