IGCSE O Level Chemistry MCQs (O Level) From Textbook

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IGCSE O Level Chemistry MCQs – Practice Test 8 (Chapter 14)

Structure of Atom Notes Questions with Answers PDF Download – Test 8

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The MCQ: Number of electrons in calcium is 20. outermost shall have as many as; "IGCSE O Level Chemistry Notes" App APK Download [Free] with answers: 1 electron, no electrons, 2 electrons, and more than 2 electrons to learn online schools courses. Practice GCE O Level Chemistry Quiz Questions, download Kobo e-Book (Free Chapter) to learn online schools courses.

Structure of Atom Test Questions and Answers PDF Download: MCQ 8

MCQ: 36

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
MCQ: 37

The period number indicates the number of

  1. neutrons
  2. valence electrons
  3. electron shells
  4. all of above
MCQ: 38

Helium (He) is not an inert gas because it has

  1. higher chemical reactivity only
  2. half shell of valence electrons only
  3. no electrons
  4. higher chemical reactivity and half shell of valence electrons
MCQ: 39

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
MCQ: 40

The same number of shells are found in elements of

  1. same group
  2. same period
  3. same type
  4. same mass number

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