
Concept explainers
(a)
Interpretation:
The electronic configuration of given atom and its most stable ion is to be written.
Concept introduction:
The electronic configuration is the arrangement of electrons in an atom. The atoms lose or gain electrons to acquire noble gas configuration because the ion which achievesthe nearest noble gas configuration is most stable.
(a)

Answer to Problem 20A
Electronic configuration of
Therefore, Electronic configuration of
It attains configuration as
Explanation of Solution
Lithium belongs to ist group. So, it has a tendency to lose one electron and form the most stable ion
(b)
Interpretation:
The electronic configuration of given atom and its most stable ion is to be written.
Concept introduction:
The electronic configuration is the arrangement of electrons in an atom. The atoms lose or gain electrons to acquire noble gas configuration because the ion which achievesthe nearest noble gas configuration is most stable.
(b)

Answer to Problem 20A
Electronic configuration of
Therefore, Electronic configuration of
It attains configuration as
Explanation of Solution
Bromine belongs to the 17th group. So it has a tendency to gain one electron and form the most stable ion
Electronic configuration of
Therefore, Electronic configuration of
(c)
Interpretation:
The electronic configuration of a given atom and its most stable ion is to be written.
Concept introduction:
The electronic configuration is the arrangement of electrons in an atom. The atoms lose or gain electrons to acquire noble gas configuration because the ion which achievesthe nearest noble gas configuration is most stable.
(c)

Answer to Problem 20A
Electronic configuration of
Therefore, Electronic configuration of
It attains configuration as
Explanation of Solution
Cesium belongs to the first group. So it has a tendency to lose one electron and form the most stable ion
Electronic configuration of
Therefore, Electronic configuration of
(d)
Interpretation:
The electronic configuration of the given atom and its most stable ion is to be written.
Concept introduction:
The electronic configuration is the arrangement of electrons in an atom. The atoms lose or gain electrons to acquire noble gas configuration because the ion which achievesthe nearest noble gas configuration is most stable.
(d)

Answer to Problem 20A
Electronic configuration of
Therefore, Electronic configuration of
It attains configuration as
Explanation of Solution
Sulfur belongs to the 16th group. So it has a tendency to gain two electrons and form the most stable ion
Electronic configuration of
Therefore, Electronic configuration of
(e)
Interpretation:
The electronic configuration of the given atom and its most stable ion is to be written.
Concept introduction:
The electronic configuration is the arrangement of electrons in an atom. The atoms lose or gain electrons to acquire noble gas configuration because the ion which achievesthe nearest noble gas configuration is most stable.
(e)

Answer to Problem 20A
Electronic configuration of
Therefore, Electronic configuration of
It attains configuration as
Explanation of Solution
Magnesium belongs to the 2nd group. So it has a tendency to lose two electrons and form the most stable ion
Electronic configuration of
Therefore, Electronic configuration of
Chapter 12 Solutions
World of Chemistry, 3rd edition
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