Question

Of the compounds below whch has the smallest ionic separation. EXPLAIN YOUR CHOICE

KF

K2S

RbCl

SrBr2

RbF

Answer 1

answer : KF

explanation:

ionic separation dependes on electronegative of an atom / ion and size of atom / ions.

1) greater electronegaivity will cause smallest ionic separtion

2) greater atomic size will cause greater ionic separation

3) greater charge on ions will cause greater ionic separation.

based on these statements among given options SrBr2 option excluded because Sr charge = +2

and K2S and RbCl S^-2 and Cl- sizes are larger compared to F - size. so only options remains KF and RbF.

Rb size is larger than K size. Rb has greater ionic sepration . so ultimate option is KF