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IGCSE O Level Chemistry MCQ App Download | Structure of Atom PDF e-Book

IGCSE O Level Chemistry MCQs: Chapter 14

Structure of Atom Trivia Questions & Answers PDF Download | 8

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Structure of Atom Exam Questions and Answers PDF Download: Test 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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Structure of Atom Apps (Android & iOS)

Structure of Atom App

O Level Chemistry Apps (Android & iOS)

O Level Chemistry App

10th Grade Chemistry Apps (Android & iOS)

10th Grade Chemistry App

9th Grade Chemistry Apps (Android & iOS)

9th Grade Chemistry App