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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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:

no electrons
1 electron
2 electrons
more than 2 electrons

MCQ 37: The period number indicates the number of:

neutrons
valence electrons
electron shells
all of above

MCQ 38: Helium (He) is not an inert gas because it has:

higher chemical reactivity only
half shell of valence electrons only
no electrons
higher chemical reactivity and half shell of valence electrons

MCQ 39: Carbon-12 is chosen as the standard atom because:

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

MCQ 40: The same number of shells are found in elements of:

same group
same period
same type
same mass number

Structure of Atom Notes App & e-Book – IGCSE O Level Chemistry Admission Tests

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Structure of Atom MCQs

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