Answer
Pb=180 pm, Fcc crystal structure ,2.33 electronegativity
Pt=175 pm, Fcc crystal structure ,2.2 electronegativity
the atomic radius difference is close to 15 (completely soluble)
Work Step by Step
For a substitutional solid solution having complete solubility, the following conditions must be satisfied:
1. Atomic radius difference must be less than 15.
2. Both have same electronegativity.
3. Both have same crystal structure.
4.Both have same valence electrons.
Pb=180 pm, Fcc crystal structure ,2.33 electronegativity
Pt=175 pm, Fcc crystal structure ,2.2 electronegativity
The atomic radius difference is close to 15, and electronegativity requirements are satisfied.
