[xXxiKillxXx]

Surely the answer is C? Since it is the only electron density map (for Iodine) in the list that contains 5 shells..

[Farseer]

The rings don't represent shells. I'd say A.

[xXxiKillxXx]

(Original post by Farseer)
The rings don't represent shells. I'd say A.

Oh! Why do you think its A?

[Farseer]

(Original post by xXxiKillxXx)
Oh! Why do you think its A?

Big anion = polarisable

small cation = polarising

So I'd expect the cation to be stealing the electron density from the I^-

B is impossible (a negative charge wont be attracting the electrons from a cation)

C is unlikely given above

D is possible but suggests a nearly covalent bond - I think you'd need a very high charge density cation (like Al3+) to get that much polarisation

so go with A

[charco]

(Original post by Farseer)
Big anion = polarisable

small cation = polarising

So I'd expect the cation to be stealing the electron density from the I^-

B is impossible (a negative charge wont be attracting the electrons from a cation)

C is unlikely given above

D is possible but suggests a nearly covalent bond - I think you'd need a very high charge density cation (like Al3+) to get that much polarisation

so go with A

This is correct (except that D represents covalent bonding with a dipole)