(a)
Interpretation:
The general formula for an ionic compound formed by elements in the given groups should be determined and explained with an example.
Concept Introduction:
Ionic compounds are formed by attraction of positive and negative charge ions. An atom of element with high electronegativity can gain electron/s to form negative charge ions and an atom of element with low electronegativity can lose electron/s to form positive charge ions. These negative and positive charged ions combined to form ionic compounds.

Answer to Problem 5ALQ
General formula:
Example: NaCl, sodium chloride.
Explanation of Solution
Group 1 elements are alkaline metals, they can give one electron to form positive charged ion with charge + 1.
The general electronic configuration of group 1 elements is
Here, M represents the alkali metal.
Similarly, the general electronic configuration of group 7 or VII B(according to old IUPAC) elements is
Here, X represents the halogen.
The ionic compound should be neutral since, there is 1 positive and 1 negative charge, according to crisscross method, they combine in 1:1 ratio and the formula of ionic compound will be:
For example: The ionic compound formed by alkali metal sodium Na and halogen Cl will be NaCl and the name of compound will be sodium chloride.
(b)
Interpretation:
The general formula for an ionic compound formed by elements in the given groups should be determined and explained with an example.
Concept Introduction:
Ionic compounds are formed by attraction of positive and negative charge ions. An atom of element with high electronegativity can gain electron/s to form negative charge ions and an atom of element with low electronegativity can lose electron/s to form positive charge ions. These negative and positive charged ions combined to form ionic compounds.

Answer to Problem 5ALQ
General formula:
Example:
Explanation of Solution
Group 2 elements are alkaline earth metals, they can give two electrons to form positive charged ion with charge + 2.
The general electronic configuration of group 2 elements is
Here, M represents the alkali earth metal.
Similarly, the general electronic configuration of group 7 or VII B (according to old IUPAC) elements is
Here, X represents the halogen.
The ionic compound should be neutral since, there are2 positive chargesand 1 negative charge, according to crisscross method, 1 positive charged ion combines with 2 negative charged ions and the formula of ionic compound will be:
For example: The ionic compound formed by alkali earth metal magnesium Mg and halogen Cl will be
(c)
Interpretation:
The general formula for an ionic compound formed by elements in the given groups should be determined and explained with an example.
Concept Introduction:
Ionic compounds are formed by attraction of positive and negative charge ions. An atom of element with high electronegativity can gain electron/s to form negative charge ions and an atom of element with low electronegativity can lose electron/s to form positive charge ions. These negative and positive charged ions combined to form ionic compounds.

Answer to Problem 5ALQ
General formula:
Example:
Explanation of Solution
Group 1 elements are alkaline metals, they can give one electron to form positive charged ion with charge + 1.
The general electronic configuration of group 1 elements is
Here, M represents the alkali metal.
Similarly, elements in group 6 or VI B (according to old IUPAC) belongs to oxygen family. The general electronic configuration is
The formation of negatively charged ion will be as follows:
Here, Y represents the element from oxygen family.
The ionic compound should be neutral since, there is 1 positive chargeand 2 negative charges, according to crisscross method, 2 positive charged ions combines with 1 negative charged ion and the formula of ionic compound will be:
For example, the ionic compound formed between alkali metal Li and oxygen will be
(d)
Interpretation:
The general formula for an ionic compound formed by elements in the given groups should be determined and explained with an example.
Concept Introduction:
Ionic compounds are formed by attraction of positive and negative charge ions. An atom of element with high electronegativity can gain electron/s to form negative charge ions and an atom of element with low electronegativity can lose electron/s to form positive charge ions. These negative and positive charged ions combined to form ionic compounds.

Answer to Problem 5ALQ
General formula:
Example:
Explanation of Solution
Group 2 elements are alkaline earth metals, they can give two electrons to form positive charged ion with charge + 2.
The general electronic configuration of group 2 elements is
Here, M represents the alkali earth metal.
Similarly, elements in group 6 or VI B (according to old IUPAC) belongs to oxygen family. The general electronic configuration is
The formation of negatively charged ion will be as follows:
Here, Y represents the element from oxygen family.
The ionic compound should be neutral since, there are 2 positive and 2 negative charges, according to crisscross method, they combine in 1:1 ratio and the formula of ionic compound will be:
For example, the ionic compound formed between alkaline earth metal Mg and oxygen will be
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Chapter 5 Solutions
Introductory Chemistry: Foundation - Text (Looseleaf)
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