Cohesion of gold foil is an example of______________?
Correct answer: D. Atomic attraction and welding
- A. Adaptation
- B. Annealing
- C. Wedging
- D. Atomic attraction and welding
Explanation
Gold foil is cohesive because clean gold surfaces attract atomically and cold-weld when brought into contact under pressure. Annealing softens the foil, whereas wedging and adaptation describe placement or shaping rather than the cause of cohesion.
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