Final answer:
In chemistry, there are three entities that will stain as homogeneous: blood, argon, and silicon dioxide.
Step-by-step explanation:
Blood is a homogeneous mixture, specifically a solution. This means that its components, such as red blood cells, white blood cells, and plasma, are evenly distributed throughout the mixture. Argon is a pure substance and an element. It exists as individual argon atoms and cannot be broken down into simpler substances.
Silicon dioxide is also a pure substance but is a compound. It consists of silicon and oxygen atoms in a fixed ratio and has a uniform composition throughout. So therefore blood, argon, and silicon dioxide are the three entities that will stain as homogenous.