`SiF_6^(2-)` is known while `SiCl_6^(-2)` is not - explain.

[SiF_6]^(2-) exists while [SiCl_6]^(2-) does not. Explain ?

[SiF_6]^(2-) is known but [SiCI_6]^(2-) is not. Give reasons.

[SiF_(6)]^(2-) is known where as [SiCl_(6)]^(2-) not. Reason is

[SiF_(6)]^(2-) is known where as [SiCl_(6)]^(2-) not. Reason is

Assertion: SiF_(6)^(2-) is known but SiCl_(6)^(2-) is not. Reason: Size of fluorine is small and its lone pair of electrons intersects with d-orbitals of Si strongly.

Assertion: SiF_(6)^(2-) is known but SiCl_(6)^(2-) is not. Reason: Size of fluorine is small and its lone pair of electrons intersects with d-orbitals of Si strongly.