CHEMISTRY · Single correct · GCSE · Chemistry · Bonding, Structure and the Properties of Matter · Bonding, Structure and the Properties of Matter
Problem
Four copper-based alloys are listed below. Based on lattice distortion considerations alone, which alloy is expected to be the most ductile at room temperature?
Alloy I: Cu + 5 at.% Zn (atomic radius Zn ≈ atomic radius Cu)
Alloy II: Cu + 2 at.% Al (atomic radius Al slightly smaller than Cu)
Alloy III: Cu + 0.8 at.% C (atomic radius C ≪ Cu)
Alloy IV: Pure Cu
(a) Alloy II
(b) Alloy IV
(c) Alloy I
(d) Alloy III