Q. 43.8( 14 Votes )

<span lang="EN-US

Answer :

(i) The number of valence electrons present in the atoms helps in finding out the valency. Electronic configuration helps in finding the number of valence electrons in the atom. The valency of an element is determined by number of electrons lost or regained to achieve the nearest stable configuration.


(ii) Given: atomic no. of X = 9


Electronic configuration of X = 2, 7


Since, there are 7 electrons in its outermost shell and only one electron is required to complete the octet and to achieve stable gas configuration. So, the valency of element X = 1


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
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
RELATED QUESTIONS :

(a) The modern peScience - Board Papers

<span lang="EN-USScience - Board Papers

What were the limLakhmir Singh & Manjit Kaur - Chemistry

Would you place tLakhmir Singh & Manjit Kaur - Chemistry

Name two elementsLakhmir Singh & Manjit Kaur - Chemistry

The correct formuLakhmir Singh & Manjit Kaur - Chemistry