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جست‌وجوساخت آزمون
سؤال 109

Which description correctly defines isotopes of a single element?

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

توضیح

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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