(a)
Interpretation: The number of electrons lost by calcium to attain noble-gas electron configuration needs to be determined.
Concept Introduction: An atom loses or gains electron/s to attain noble gas configuration or to complete an octet. Here, metals lose electron/s and non-metals gain electrons.
(a)
Answer to Problem 31A
Explanation of Solution
The given element is calcium. It is a metal; thus, it loses electrons to attain noble gas configuration. Herecalcium belongs to group 2 thus, it has 2 valance electrons. Thenumber of electrons lost by calcium is 2.
(b)
Interpretation: The number of electrons lost by aluminum to attain noble-gas electron configuration needs to be determined.
Concept Introduction: An atom loses or gains electron/s to attain noble gas configuration or to complete an octet. Here, metals lose electron/s and non-metals gain electrons.
(b)
Answer to Problem 31A
Explanation of Solution
The given element is aluminum. It is a metal; thus, it loses electrons to attain noble gas configuration. Here, aluminum belongs to group 13 thus, it has 3 valance electrons. The number of electrons lost by aluminum is 3.
(c)
Interpretation: The number of electrons lost by lithium to attain noble-gas electron configuration needs to be determined.
Concept Introduction: An atom loses or gains electron/s to attain noble gas configuration or to complete an octet. Here, metals lose electron/s and non-metals gain electrons.
(c)
Answer to Problem 31A
Explanation of Solution
The given element is lithium. It is a metal; thus, it loses electrons to attain noble gas configuration. Here, lithium belongs to group 1 thus, it has 1 valance electron. The number of electrons lost by lithium is 1.
(d)
Interpretation: The number of electrons lost by barium to attain noble-gas electron configuration needs to be determined.
Concept Introduction: An atom loses or gains electron/s to attain noble gas configuration or to complete an octet. Here, metals lose electron/s and non-metals gain electrons.
(d)
Answer to Problem 31A
Explanation of Solution
The given element is barium. It is a metal; thus, it loses electrons to attain noble gas configuration. Here, barium belongs to group 2; thus, it has 2 valance electrons. The number of electrons lost by barium is 2.
Chapter 7 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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