An atom has a mass number of 112 and contains 48 protons. How many neutrons does this atom contain?
- Mayya Alocci
- 4 days ago
- 1 min read
Regents Chemistry Exam August 2025 Question 32
32 An atom has a mass number of 112 and contains 48 protons. How many neutrons does this atom contain?
(1) 48
(2) 54
(3) 64
(4) 160
Solution:
Mass is equal to the number of protons plus neutrons. To get the number of neutrons, we just need to subtract 48 from 112. Choice 3 is the correct answer.
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