Title: Concept Check: Phases and Alloys

Q: Which of the following statements are accurate?
- A solid solution is a single phase where multiple elements are mixed homogeneous together in the crystal lattice. (correct)
- Solid, liquid, and gas are the only three phases of matter.
- Phases are structurally distinct regions of matter. (correct)
- A two-phase regions are the same as binary solid solution (i.e. an alloy with two components).
- All alloys are solid solutions.
- All alloys are multi-phase materials.
- We made a steel (an alloy of iron and carbon) where the carbon is dissolved and present throughout the iron lattice but some grains are FCC and others are BCC in crystal structure.  This material is a two-phase solid solution. (correct)
- There can be more than one phase of a solid. (correct)
Feedback (0 to 80%): It would be good to strengthening your understanding before moving forward. Feel free to reach out if you are struggling with the concepts
Feedback (81 to 100%): Great job!