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O Level Chemistry Cerification Guide: Certification Test 659

Protons Neutrons and Electrons MCQ App & e-Book: MCQ 659

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MCQ: 659

Carbon-12 is chosen as the standard atom because

  1. it is found in most organic compounds
  2. it is decomposable in nature
  3. mass of 12 units has been measured very accurately
  4. Carbon is the most common element
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