Interpretation: The pairs of atoms that can form an ionic compound need to be determined.
Concept Introduction: An ionic compound is formed when a metal reacts with a non-metal. Here, metal is electron efficient and loses electrons while non-metal is electron deficient, thus, it gains electrons. In an ionic compound, metal has a partially positive charge and non-metal has a partially negative charge.
Answer to Problem 40A
Options (a), (c) and (e).
Explanation of Solution
Reason for correct option/s:
Considering Li and S, here, Li is a metal that can lose one electron to form lithium-ion
Considering Al and O, here, Al is a metal that can lose 3 electrons to form an aluminumion
Considering I and K. Here, I is non-metal which can gain 1 electron. K is a metal that can gain 1 electron. Thus, I and K both can combine to form an ionic compound KI.
Therefore, correct option is (a), (c) and (e).
Reason for incorrect option/s:
Ionic compounds are formed from metal and non-metal. Here, one atom (of metal) is electron rich which loses electron/s and one atom (of non-metal) is electron deficient which gains electron/s.
Considering O and S, here both O and S are non-metals thus, they cannot chemically combine to form an ionic compound.
Considering F and Cl. Here, both F and Cl are non-metals; thus, they cannot chemically combine to form an ionic compound.
Considering H and N. Here, both N and H are non-metals. They cannot combine chemically to form an ionic compound.
Therefore, options (b), (d), and (f) are incorrect options.
Chapter 7 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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