WAEC Chemistry 2011 Theory — Question 11
Question 11 of 31 from the West African Examinations Council (WAEC) Chemistry 2011 Theory paper, with the correct answer and a full explanation.
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2(d)(i) What is a covalent compound? (ii) Give two factors that influence covalent bonding. (iii) State the type of bond that exists in each of the following substances: MgO, NH3 and Fe. (iv) What are intermolecular forces?
Model answer
(i) A covalent compound is a compound formed when the participating elements donate electrons equally for sharing in order to attain the octet. (ii) Electronegativity difference and ionization energy. (iii) MgO - electrovalent/ionic bonding; NH3 - covalent bond/hydrogen bonding; Fe - metallic bond. (iv) Intermolecular forces are the forces that hold the molecules of a substance together and affect the properties of the substance.
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