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What are the number of protons and neutrons in the nucleus of an isotope of uranium?

publish date: 2022/09/16 22:36:00 GMT+10

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An isotope of uranium has an atomic number of 92 and a mass number of 235. What are the number of protons and neutrons in the nucleus of this atom?

  • Number of protons =
  • Number of neutrons =

Correct Answer

(1) 92
(2) 143

Explanation

If the atomic number of uranium is 92, then that is the number of protons in the nucleus. Because the mass number is 235, then the number of neutrons in the nucleus is 235 − 92, or 143

Reference

Beginning Chemistry v. 1.0

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