CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Define valency of an element. Find the valency of chlorine and magnesium (At. No. of Cl=35.5,
Mg = 12)

Open in App
Solution

Valency: Valency may also be define as number of valence electron present in outer most shell.

  • For element, if the number of electron is ≤ 4 then the valency will be the number of electron present in outer shell.
  • If number of electron is > 4 then valency will be (8-n), where n is the number of electron present in outer most shell.

Valency of chlorine: Atomic no. =17

Configuration :2,8, '7 '= (8-7=1) valency is 1

Valency of Magnesium: Atomic number = 12

Configuration : 2, 8, 2 , so valency = 2


flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Introduction to Hydrogen
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon