Answer : The correct option is, (a) Groups 3A through 8A
Explanation :
The general electronic configurations of :
Group 1A :
Group 2A :
Group 3A :
Group 4A :
Group 5A :
Group 6A :
Group 7A :
Group 8A :
Transition metal :
Inner transition metal (Lanthanoids) :
Inner transition metal (Actinoids) :
From the general electronic configurations, we conclude that the groups 3A through groups 8A elements that are characterized by the filling of p-orbitals.
Elements that are characterized by the filling of p orbitals are classified as .
Further Explanation:
In order to make the study of numerous elements easier, these elements are arranged in a tabular form in increasing order of their atomic numbers. Such a tabular representation of elements is called a periodic table. Horizontal rows are called periods and vertical columns are called groups. A periodic table has 18 groups and 7 periods.
a. Groups 3A through 8A
The elements from group 3A to 8A has the general outermost electronic configuration of . So the added electrons are to be filled in p orbitals.
b. Transition metals
These metals have the general valence configuration of . This indicates that the added electrons enter either s or d orbitals.
c. Inner transition metals
These are classified as lanthanoids and actinoids. The general outermost configuration of lanthanoids is while that of actinoids is . In both cases, the added electron enters either d or f orbitals.
d. Groups 1A and 2A
The elements of group 1A have the general valence electronic configuration of . It implies the last or valence electron enters in the s orbital. The group 2A elements have a general configuration of . Here also the last electron enters the s orbital.
So elements from groups 3A to 8A are classified by the filling of p orbitals and therefore option a is correct.
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Answer details:
Grade: High School
Subject: Chemistry
Chapter: Periodic classification of elements
Keywords: periodic table, configuration, ns1, ns2, d, p, f, 3A, 8A, transition metals, inner transition metals, lanthanoids, actinoids, orbitals, 1A, 2A.
Answer:
2,5 or 7
Explanation:
(2) higher boiling point and a lower freezing point
(3) lower boiling point and a higher freezing point
(4) lower boiling point and a lower freezing point
Answer: Conduction, radiation and convection all play a role in moving heat between Earth's surface and the atmosphere. Since air is a poor conductor, most energy transfer by conduction occurs right near Earth's surface. ... During the day, sunlight heats the ground, which in turn heats the air directly above it via conduction.
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Electopositivity is the measure of the ability of elements to donate electrons to form positive ions. Whereas the Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. Group 1 is more electropositive than group 17 and group 17 is more electronegative than group 1.