Question

What is pdB substitutional alloy or intermetallic compound

Answer 1

Complete question:

Whether PdB₀.₁₅ is a substitutional alloy or intermetallic compound:

Answer:

PdB₀.₁₅ is an intermetallic compound.

Explanation:

Substitutional alloy: In this alloy, some of the original metal atoms are replaced by other metal atoms of similar size

Intermetallic compound: In this compound, the empty spaces in the metals are filled by atoms of other metals or nonmetals.

Thus, the size of the compound are need to be determined.

The atomic radius of lead (Pb) is 202 pm and the atomic radius of boron (B) is 85 pm.

So, the Pb and B are not of similar size, so it cannot be substitutional alloy and the size of B is much smaller. Thus, PdB₀.₁₅ is an intermetallic compound.