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

How does number of (i) valence electrons (ii) valency; vary on moving from to right:
(a) in the second period of a periodic table ?
(b) in the third period of a periodic table ?

Open in App
Solution

a) On moving from left to right in the second period, the number of valence electrons increases from 1 (Li) to 8 (Ne), whereas the valency increases from 1 (Li) to 4 (C) and then decreases from 4 to 0 (Ne).

b) Similarly, in third period the number of valence electrons increases from 1 (Na) to 8 (Ar) i.e., from left to right, whereas the valency increases from 1 (Na) to 4 (Si) and then decreases from 4 to 0 (Ar).


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