how can we identify from valency number that the element is co-valence/ electrovalence
& Metal/Non-metal?
For example: Chlorine
Electronic Configuration: 2, 8, 7
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how can we identify from valency number that the element is co-valence/ electrovalence
& Metal/Non-metal?
For example: Chlorine
Electronic Configuration: 2, 8, 7
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Calculation of valency :
if number of electron in the outermost shell is less than 4 then its valency will be the number of electron present in the Outermost shell...For exmaple for Sodium atom , its electronic configuration is 2 , 8 , 1..
Number of electron in the outermost shell is 1 which is less than 4...so Valency will be 2 here...
If number of electron in the outermost shell is greater than 4...then valency will be 8 MINUS Number of electrons present in the outermost shell...
For example : Chlorine
Elec. Config : 2, 8 , 7
Here no of electron in outermost shell is 7 which is greater than 4...so here valency will be 8 - 7 = 1...
So valency of Chlorine is 1
Generally All metals have electrons less than 4 in their outermost shell and Non metals have electrons more than 4 in their outermost shell...