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O Level Chemistry Placement Tests: Certification Test 612

Proton and Nucleon Number Study App & e-Book: MCQ 612

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MCQ: 612

The number of electrons in calcium is 20. outermost shall have as many as

  1. no electrons
  2. 1 electron
  3. 2 electrons
  4. more than 2 electrons

Proton & Nucleon Number Placement Tests: O Level Chemistry App & eBook Quiz

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