With iodide, the solvate $\ce{NaI \cdot 3(CH3)2CO}$ can be formed, in which each $\ce{Na+}$ is coordinated by 6 acetone ligands via oxygen lone pairs, and the $\ce{I-}$ ions fill in the gaps between these octahedral units, being surrounded by the methyl groups of the acetones.
Randomization is a sampling method used in scientific experiments. It is commonly used in randomized controlled trials in experimental research.
Appendix: traditional normalization. Normalization is usually thought of as a process of applying a set of rules to your database design, mostly to achieve minimum redundancy in the data. Most textbooks present this as a three-step process, with correspondingly labeled ânormal forms,â which could be done in an almost algorthmic sequence.