
(a)
Interpretation:
The electronic configuration which is likely to form negative ion needs to be determined.
Concept Introduction:
An element that by accepting electron will achieve a half-filled or full-filled electronic configuration will likely to form a negative ion.
(a)

Answer to Problem 71A
Explanation of Solution
If the
(b)
Interpretation:
The electronic configuration which is likely to have low ionization energy needs to be determined.
Concept Introduction:
Removal of an electron that will give the most stable half-filled and full-filled electronic configuration will have the lowest ionization energy.
(b)

Answer to Problem 71A
Explanation of Solution
When an electron is removed from
Now,
(c)
Interpretation:
The most reactive metal is to be identified.
Concept Introduction:
Metals which easily donate electrons to achieve stable half-filled or full-filled configuration are most reactive. Alkali metals are reactive due to their electronic configuration.
(c)

Answer to Problem 71A
Explanation of Solution
If the
Now,
(d)
Interpretation:
The electronic configuration which is likely to have more unpaired of electrons needs to be determined.
Concept Introduction:
When an electron does not get paired up in orbital but occupies the orbital singly then it is called an unpaired electron.
(d)

Answer to Problem 71A
Explanation of Solution
Orbital diagram of
It is obvious from the diagram that there are three unpaired electrons which is highest among the options given.
(e)
Interpretation:
The metal that will combine with oxygen in
Concept Introduction:
A metal which can donate two electrons from its valence to complete the octet of oxygen will combine with oxygen in
(e)

Answer to Problem 71A
Explanation of Solution
Magnesium (Mg) will donate two electrons from its
(f)
Interpretation:
The formula the compound formed between
Concept Introduction:
A stable compound is formed when both the atoms participating in the combination achieves complete octet.
(f)

Answer to Problem 71A
The formula of the compound is
Explanation of Solution
So, 3
(g)
Interpretation:
The formula the compound formed between
Concept Introduction:
A stable compound is formed when both the atoms participating achieves complete octet.
(g)

Answer to Problem 71A
The formula of the compound is
Explanation of Solution
Three
(h)
Interpretation:
The order of ionization energy needs to be determined.
Concept Introduction:
Ionization energy is a measure of the difficulty in removing an electron from an atom or ion or the tendency of an atom or ion to lose an electron. It is the energy required. So, this process is endothermic.
(h)

Answer to Problem 71A
Order of increase in ionization energy is
Explanation of Solution
- The ionization energy of the elements usually increases throughout the period.
- The ionization energy of the elements usually decreases throughout the group.
- Ionization energies of noble gases are very high because of octet completion. That is why neon has the highest ionization energy of all the elements given.
Considering all facts, the order of increasing ionization energy is
Chapter 11 Solutions
World of Chemistry
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