Q. 225.0( 1 Vote )

The electronic configuration of an element X is 2, 8, 8, 2. To which (a) period and (b) group of the modern periodic table does X belong? State its valency. Justify your answer in each case.

Answer :

(a) From electronic configuration, we can observe that the number of shells is 4. Thus it belongs to the 4th period.

(b) From electronic configuration, we can observe that the number of valence electrons is 2. Thus, it belongs to 2nd group.


Valency also depends on the number of valence electrons. Given element X tends to loose two electrons thus it has a valency of 2.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Mnemonics to Learn Modern Periodic TableMnemonics to Learn Modern Periodic TableMnemonics to Learn Modern Periodic Table38 mins
Important Mnemonics to Learn Modern Periodic TableImportant Mnemonics to Learn Modern Periodic TableImportant Mnemonics to Learn Modern Periodic Table48 mins
Be a Master of Classification in Reasoning!!Be a Master of Classification in Reasoning!!Be a Master of Classification in Reasoning!!47 mins
Classification of SoilsClassification of SoilsClassification of Soils41 mins
Exploring Periodic TableExploring Periodic TableExploring Periodic Table29 mins
Classification of Resources on the Basis of DevelopmentClassification of Resources on the Basis of DevelopmentClassification of Resources on the Basis of Development43 mins
Goprep Genius Quiz  | Analogy and ClassificationGoprep Genius Quiz  | Analogy and ClassificationGoprep Genius Quiz | Analogy and Classification48 mins
Quiz | Criterion of Similarity of TriangleQuiz | Criterion of Similarity of TriangleQuiz | Criterion of Similarity of Triangle45 mins
Nature of Roots of Quadratic EquationsNature of Roots of Quadratic EquationsNature of Roots of Quadratic Equations51 mins
Quiz on  Number of Solutions of an EquationQuiz on  Number of Solutions of an EquationQuiz on Number of Solutions of an Equation24 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses