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ICSE Class 9 Answered

1)How to calculate the valency of any radical?2)what is the formula and valency of chromate,carbonate,aluminate oxide
Asked by shabana | 17 Nov, 2018, 03:52: PM
answered-by-expert Expert Answer
1) Valency of an atom is equal to the number of electrons in the outer shell.
If the number of electrons in the outermost shell is four or less than four then it is the valency of that atom.
Otherwise, the valency is eight minus the number of electrons in the outermost shell.
If you know the number of electrons in the outer shell then you can calculate the valency. 
 
2) Following is the list of various radicals and their charge or valency:
Answered by Ramandeep | 19 Nov, 2018, 11:30: AM
ICSE 9 - Chemistry
Asked by anasaabbag | 11 Feb, 2019, 07:40: AM
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ICSE 9 - Chemistry
Asked by shabana | 17 Nov, 2018, 03:52: PM
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ICSE 9 - Chemistry
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