WAEC Chemistry questions: Atomic structure and bonding

26 questions with answers and explanations. Tap an option to check yourself.

1. Question 21· Atomic structure and bonding· WAEC

   The electron configuration of chlorine (atomic number 17) is

   • A2, 8, 8
   • B2, 8, 7
   • C2, 7, 8
   • D2, 8, 1

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2. Question 22· Atomic structure and bonding· WAEC

   Isotopes of an element have

   • Adifferent numbers of electrons
   • Bthe same number of neutrons but different numbers of protons
   • Cdifferent atomic numbers
   • Dthe same number of protons but different numbers of neutrons

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3. Question 23· Atomic structure and bonding· WAEC

   The shape of a methane molecule is

   • Abent
   • Blinear
   • Ctrigonal planar
   • Dtetrahedral

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4. Question 24· Atomic structure and bonding· WAEC

   The particles found in the nucleus of an atom are

   • Aprotons and neutrons
   • Belectrons and protons
   • Celectrons only
   • Dneutrons and electrons

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5. Question 25· Atomic structure and bonding· WAEC

   An atom of an element has 11 protons and 12 neutrons. Its mass number is

   • A12
   • B11
   • C23
   • D1

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6. Question 26· Atomic structure and bonding· WAEC

   The element with electron configuration 2, 8, 2 belongs to

   • AGroup 2, Period 3
   • BGroup 3, Period 2
   • CGroup 2, Period 2
   • DGroup 8, Period 3

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   Explanation and discussion