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Oxyanions

Back to Naming Compounds...

 

Br I Cl Mn N C

These elements form oxyanions with the O3 baseline (n=3), have the following charges regardless of the number of oxygens present.

Element Br I Cl Mn N C
Charge 1- 1- 1- 1- 1- 2-
Resulting base (n = 3) oxyanion BrO3- IO3- ClO3- MnO3- NO3- CO32-

 

 

Cr As P S

These elements form oxyanions with the O4 baseline (n=4), have the following charges regardless of the number of oxygens present.

Element Cr As P S memorize:
this triangle helps remembering the charges.
Charge 2- 3- 3- 2-
Resulting base (n = 4) oxyanion CrO42- AsO43- PO43- SO42-

 

 

Discussions on Charges Within the Same Group

Example, the charge of SO42- is -2.  
     
The charge of SO32- is also -2.  

 

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