
Interpretation:
The electronic configuration for an element with known group number needs to be predicted.
Concept introduction:
Vertical columns in the periodic table are known as groups. The elements having same number of valence electrons are present in same groups.

Answer to Problem 2E
Elements belonging to same group in periodic table have same outermost electronic configuration.
Explanation of Solution
If the valence shell electronic configuration is same then those elements are in the same group of the periodic table.
The chemical properties are controlled by valence shell electrons as these electrons participate in
If group number of any element is known then the number of electrons in its valence electrons can be determined.
Elements in same group of periodic table have similar valence shell electronic configuration.
Chapter U1 Solutions
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