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In SiF_(6)^(2-) and SiCl_(6)^(2-) which one is known and why

Answer»

`SiF_(6)^(2-)` because of SMALL size of F
`SiF_(6)^(2-)` because of large size of F
`SiCl_(6)^(2-)` because of small size of Cl
`SiCl_(6)^(2-)` because of large size of Cl

Solution :In `SiF_(6)^(2-)` and `SiCl_(6)^(2-),SiF_(6)^(2-)` is KNOWN due to the small size of F ATOMS. The small six F atoms F atoms can be easily accommodated around SI atom to form `SiF_(6)^(2-)` while in `SiCl_(6)^(2-)`, six large Cl atoms cannot be accommodated around Si atom.


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