wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

What is the number of valence electrons in :

(a) sodium ion, Na+

(b) oxide ion, O2–

Open in App
Solution

(a) Atomic number of sodium atom = 11
In Na+ ion, there are only 10 electrons. The electronic configuration is 2 , 8. Therefore, the number of valence electrons in sodium ion is 8.

(b) Atomic number of oxygen atom = 8
In O2- ion, there will be 10 electrons, as it has gained two electrons. The electronic configuration is 2, 8. Therefore, the number of valence electrons in O2- is 8.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Reproduction in Plants
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon