Compare the radii of two species X and Y.

Question:

Compare the radii of two species X and Y. Give reasons for your answer.

(a) X has 12 protons and 12 electrons

(b) Y has 12 protons and 10 electrons

Solution:

The available information makes it clear that :

(a) Species X with equal number of protons (12) and electrons (12) is an atom.

(b) Species Y with two electrons less (10) than the number of protons (12), is a divalent cation y2+ of species X.

Therefore, the radius of species X is more as compared to that of y2+.

Note : The radius of cation is always less than that of atom while that of anion is more.

Leave a comment

Close
faculty

Click here to get exam-ready with eSaral

For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.

Download Now