[tex]All\:the\:elements\:in\:a\\group\have\:the\colon\\(A)\:same\:Valency\\(B)\:Different\:Valency\\(C)\:Variable\:Valency\\(D)\:None\:of\:these[/tex]
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[tex]All\:the\:elements\:in\:a\\group\have\:the\colon\\(A)\:same\:Valency\\(B)\:Different\:Valency\\(C)\:Variable\:Valency\\(D)\:None\:of\:these[/tex]
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Answer:
All the element in a group have same valency.
Additional information :
Variation of valency along period :
Firstly valency increase then it start decrease to zero.
Example :
Li , Be , B , C , N , O , F , Ne
Here valency Li to C firstly increase. But after N to Ne it decrease to zero.
Variable of valency in group :
Since number of valence electron in group remain same. Therefore , valency do not change.
Example :
H , Li , Na , K , Rb , Cs , Fr
Here valency remain same.