SELECT * FROM question_mgmt as q WHERE id=4005 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=8 AND subId=16 AND chapterId=183 and ex_no='5' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 9th science Structure of the Atom how will you find the valency of chlorine sulphur

Question:

How will you find the valency of chlorine, sulphur and magnesium?

Answer:

Valency of a particle is the quantity of electrons acquired, lost or shared to finish the octet of electrons in the valence shell.
Valency of chloride: It has electronic design = 2, 8, 7
In this manner, one electron is acquired to finish its octet thus its valency is 1.
Valency of sulfur: Its has electronic design = 2, 8, 6
In this manner, 2 electrons are acquired to finish its octet and henceforth its valency = 2
Valency of magnesium : It has electronic design = 2, 8, 2
Accordingly, it can lose two electrons to achieve octet and thus its valency = 2


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