AP Chemistry
2.4 Structure of Metals and Alloys
A materials scientist compares two samples at the same temperature.
Which choice correctly ranks the samples from greatest to least hardness and explains the ranking?
| Sample | Composition and structure |
|---|---|
| P | Pure iron containing only \(\text{Fe}\) atoms at regular lattice positions |
| S | Steel containing mostly \(\text{Fe}\) atoms and a small number of \(\text{C}\) atoms in interstitial spaces |
Which choice correctly ranks the samples from greatest to least hardness and explains the ranking?
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