Final answer:
Milton showed Randall a chemical reaction in the laboratory, underscoring the transformation of substances through a scientific method. The process references historical practices in chemistry and the evolution of atomic theory.
Step-by-step explanation:
Milton brought Randall into the laboratory to show him a chemical reaction. A chemical reaction demonstrates the transformation of substances through reactive processes, often depicted visually or through symbolic representations like chemical equations. Historically, scientists like Antoine Lavoisier conducted experiments without knowing the outcomes in advance, such as when heating mercury or measuring gases from breathing, requiring them to isolate and analyze the resultant materials to understand the processes involved.
The methods for describing a chemical reaction include drawing representations of reactions, observing the mass ratios of reactants and products, and applying laws of chemical combination. John Dalton's work laid the foundation for the modern atomic theory by building upon the laws identified by his predecessors. A clear indication of the discrete nature of matter in chemical reactions was established, with contributions by scientists like Amedeo Avogadro and Johann Josef Loschmidt, who furthered our understanding of atoms, molecules, and the mole concept.