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Nguyên tố X có hai đồng vị, đồng vị thứ nhất có số khối 35 chiếm 75%. Nguyên tử khối trung bình của X là 35,5. Đồng vị thứ hai có số khối là
A. 36. B. 37. C. 38. D. 39.

Sagot :

deleon136581150028

Answer:

C

Explanation:

  • Why (C) because it is the correct answer
  • about my answer i how it correct
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