Final answer:
Labeled samples A, B, and C are respectively Iodine, Bromine, and Chlorine based on their observed states at room temperature, which align with the melting and boiling points provided in the table.
Step-by-step explanation:
The melting and boiling points of substances provide a means of identifying them. At room temperature, which is approximately 20°C, different states of matter (solid, liquid, gas) can be found depending on a substance's melting and boiling points.
Given the information in the table, we can infer that:
- Sample A has a melting point greater than 20°C, so it is a solid at room temperature. Therefore, Sample A is Iodine.
- Sample B has a melting point lower than 20°C and a boiling point greater than 20°C, so it is a liquid at room temperature. Thus, Sample B is Bromine.
- Sample C has both a melting and boiling point lower than 20°C, so it is a gas at room temperature, indicating that Sample C is Chlorine.
Learn more about States of Matter