In a mixture, the ingredients are distributed evenly throughout the mixture, while in a mixture, the ingredients are unevenly distributed throughout.

heterogeneous; homogeneous
heterozygous; homozygous
homozygous; heterozygous
homogeneous; heterogeneous

In a homogeneous mixture, the ingredients are distributed evenly throughout the mixture, while in a heterogeneous mixture, the ingredients are unevenly distributed.

The correct answer choice is the fourth one. You know this because you can eliminate the second and third choices since homozygous and heterozygous are terms more commonly used in genetics. And you can eliminate the first one because a homogenous mixture is more like a solution, where it is blended to where it looks like one substance. For example, pudding would be a homogenous mixture. So, homogeneous has to be in the first blank.

The correct name for n3-ion should be azide.