IGCSE O Level Chemistry MCQs - Chapter 14

Structure of Atom MCQ (Multiple Choice Questions) PDF - 2

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Structure of Atom Questions & Answers PDF Download: MCQ Quiz 2

MCQ 6: In the periodic table, valence electrons are indicated by

A) Group Number

B) Shell Number

C) Period Number

D) Atomic mass

MCQ 7: Elements with 4-7 valence electrons are referred to as

A) metals

B) non-metals

C) inert gases

D) transition metals

MCQ 8: If the nucleon (mass) and proton (atomic) number is 40 and 20 respectively, the element is

A) chlorine

B) phosphorus

C) potassium

D) calcium

MCQ 9: If the number of protons and electrons are 8 respectively, the valence electrons are

A) 2 in number

B) 4 in number

C) 6 in number

D) 8 in number

MCQ 10: Elements in the same period may have

A) different number of neutrons

B) same number of shells

C) different number of electrons

D) all of above

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