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Structure of the Atom — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
MCQ
What is the mass number of 17​C135 ?
  • A
    21
  • B
    25
  • C
    39
  • D
    35
✓

Answer

  1. 35

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