Terne,originally an alloy of lead (r = 154 pm,fcc)and tin (r = 140 pm),appears to contain approximately 7 tin atoms for every 16 lead atoms.Which of the following statements regarding the alloy is correct?

Question

Quizplus · Accepted Answer

Since the alloy is said to contain approximately 7 tin atoms for every 16 lead atoms, it appears that tin is substituting for some of the lead atoms in the crystal structure. Therefore, the correct option is D) It is probably a substitutional alloy. The other options, A), B), and C), are incorrect because they refer to interstitial alloys, where the smaller atoms occupy interstitial sites in the crystal structure. Also, the statement in option E) about the alloy being approximately 70% Pb and 30% Sn is not accurate, since the ratio of lead atoms to tin atoms provided is 16:7, which is not the same as the ratio of mass or volume.

Terne,originally an Alloy of Lead (R = 154 Pm,fcc)and Tin