Q. 75.0( 5 Votes )

The position of e

Answer :

(i) The atomic number of calcium Ca =20

The Electronic configuration of Ca is 2, 8, 8, 2


(ii) Since Rb belongs to 1st group therefore Rb has one valence electron.


(iii) Sr (38) belongs to 5th period. Therefore, Sr has 5 shells.


(v) K belongs to 1st group which means that it has one valence electron and therefore it can donate the electron and attain stable gas configuration. Therefore, it is a metal.


(v) The largest atom in size is Rb.


(vi) The Increasing order of the atomic size of the respective atoms is as follows:


Be < Mg < Ca < Rb


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Glimpses of IndiaGlimpses of IndiaGlimpses of India39 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