Context: Uranium is more plentiful than antimony, tin, cadmium, mercury, or silver, and it is about as abundant as arsenic or molybdenum. Uranium is found in hundreds of minerals, including uraninite (the most common uranium ore), carnotite, autunite, uranophane, torbernite, and coffinite. Significant concentrations of uranium occur in some substances such as phosphate rock deposits, and minerals such as lignite, and monazite sands in uranium-rich ores (it is recovered commercially from sources with as little as 0.1% uranium).

Question: Along with arsenic, what metal is roughly as abundant as uranium?
Answer: molybdenum

Question: Along with silver, mercury, tin and cadmium, what metal is uranium more plentiful than?
Answer: antimony

Question: What is the most prevalent uranium ore?
Answer: uraninite

Question: What mineral sometimes contains uranium?
Answer: lignite

Question: What types of rocks sometimes contain uranium?
Answer: phosphate

Question: Along with arsenic, what metal is less abundant as uranium?
Answer: Unanswerable

Question: Along with silver, mercury, tin and cadmium, what metal is uranium less plentiful than?
Answer: Unanswerable

Question: What is the least prevalent uranium ore?
Answer: Unanswerable

Question: What mineral always contains uranium?
Answer: Unanswerable

Question: What types of rocks never contain uranium?
Answer: Unanswerable