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Question 109

Which description correctly defines isotopes of a single element?

  1. Same proton count but different neutron countsCorrect answer
  2. Different proton counts but the same element name
  3. Same neutrons but necessarily different elements
  4. Different electron counts only, regardless of nuclei

Explanation

Isotopes retain the same proton count, which preserves element identity, but contain different numbers of neutrons. Changing the proton count would create a different element rather than another isotope of the original one.

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Question 109: Which description correctly defines isotopes of a single… · The Periodic Table and Elements · Questena