Question: What is a strong source of radiation that is blocked by depleted uranium?
Answer: radium

Question: How is depleted uranium used in missile re-entry vehicles?
Answer: ballast

Question: What trait causes depleted uranium to be used in gyroscopic compasses?
Answer: high density

Question: What type of alpha emitter is uranium?
Answer: weak

Question: What is another term for uranium ore?
Answer: pitchblende

Question: Who isolated radium in uranium ore?
Answer: Marie Curie

Question: In what types of paints was radium first used?
Answer: glow-in-the-dark

Question: What devices were painted with radium paint?
Answer: clock and aircraft dials

Question: Along with red, blue, black, yellow and green, what was a notable color of uranium tile glaze?
Answer: mauve

Question: What was the world's first artificial nuclear reactor?
Answer: Enrico Fermi's Chicago Pile

Question: In what state is the X-10 Graphite Reactor located?
Answer: Tennessee

Question: Along with the X-10 Pile, what was the X-10 Graphite Reactor previously known as?
Answer: the Clinton Pile

Question: In what state is Argonne National Laboratory's Experimental Breeder Reactor I located?
Answer: Idaho

Question: On what date did Breeder Reactor I first make electricity?
Answer: 20 December 1951

Question: Where does uranium rank among elements in terms of its abundance in the Earth's crust?
Answer: 51st

Question: Where is uranium naturally formed?
Answer: in supernovae

Question: Along with potassium-40 and uranium, the decay of what element is a primary heat source driving plate tectonics?
Answer: thorium

Question: In what state is the Earth's outer core?
Answer: liquid

Question: What isotope of uranium was the first to be found fissile?
Answer: 235

Question: When a nuclear chain reaction in uranium-235 doesn't result in a burst of heat, what does it result in?
Answer: an explosion

Question: How many nuclei does uranium-235 usually divide into when bombarded with slow neutrons?
Answer: two

Question: What is used to slow a chain reaction in a nuclear reactor?
Answer: neutron poison

Question: What does a neutron poison absorb?
Answer: free neutrons

Question: What type of complexes does uranium(VI) form in nature?
Answer: carbonate

Question: The presence of what substance at alkaline pH makes it difficult to precipitate uranium as phosphate?
Answer: carbonate

Question: What is BSAR-1 a strain of?
Answer: Sphingomonas sp.

Question: How much economically viable uranium is there in ore reserves, in millions of tonnes?
Answer: 5.5

Question: How many millions of tonnes are uranium are regarded as mineral resources?
Answer: 35

Question: What was the price of uranium per pound as of May 2003?
Answer: $10

Question: In 2005, how much money was spent on uranium exploration?
Answer: US$200 million

Question: How much money was spent to explore for uranium in 2006?
Answer: $774 million

Question: When was it observed that bombarding uranium with neutrons results in beta ray emission?
Answer: 1934

Question: Who led the team that discovered that bombarding uranium with neutrons created beta ray emissions?
Answer: Enrico Fermi

Question: What was the name given by Corbino to the incorrectly designated atomic number 94?
Answer: hesperium

Question: What was the job title of Orso Mario Corbino?
Answer: Dean of the Faculty of Rome

Question: Who was the aunt of Otto Robert Frisch?
Answer: Lise Meitner

Question: In what medium does the Pourbaix diagram change when carbonate anions interact with uranium(VI)?
Answer: carbonate containing solution

Question: What notable carbonates are often water soluble?
Answer: uranium

Question: What does a uranium(VI) cation form when it binds to two terminal oxides and three or more carbonates?
Answer: anionic complexes

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: What is the least prevalent major isotope of natural uranium?
Answer: uranium-234

Question: What is the natural abundance of uranium-235?
Answer: 0.71%

Question: What isotope of uranium is formed when 238U experiences spontaneous fission?
Answer: uranium-239

Question: When uranium isotope is formed from the decay of neptunium-237?
Answer: uranium-233

Question: What isotope is it theorized will form uranium-2343 after double beta decay?
Answer: thorium-232

Question: About how many tonnes of uranium is theorized to be present in the sea?
Answer: 4.6 billion

Question: What did ORNL call their material that performs surface retention on solid molecules?
Answer: HiCap

Question: The presence of what substance in sea water has resulted in low yields when attempting to extract uranium?
Answer: carbonate

Question: Where were ORNL's results verified?
Answer: Pacific Northwest National Laboratory

Question: When was HiCap announced?
Answer: 2012

Question: What is the sole fissile isotope that occurs in nature?
Answer: Uranium-235

Question: What can be turned into plutonium-239 in a nuclear reactor?
Answer: Uranium-238

Question: What uranium isotope is produced from thorium?
Answer: uranium-233

Question: Along with uranium-235, what isotope is noted for having a high fission cross-section for slow neutrons?
Answer: uranium-233

Question: What is 238U?
Answer: Depleted uranium

Question: What is OSHA?
Answer: Occupational Safety and Health Administration

Question: What is the OSHA uranium exposure limit for an 8-hour workday?
Answer: 0.25 mg/m3

Question: What does REL stand for?
Answer: recommended exposure limit

Question: What is the NIOSH uranium exposure standard over an 8-hour workday?
Answer: 0.2 mg/m3

Question: At what level of exposure does uranium become imminently dangerous to health?
Answer: 10 mg/m3

Question: Along with UO2, what is the commonest form of uranium oxide?
Answer: triuranium octoxide

Question: What is the stablest uranium compound?
Answer: Triuranium octoxide

Question: In what form is uranium most often used as fuel for nuclear reactors?
Answer: Uranium dioxide

Question: What was the earliest year in recorded history that uranium oxide was used?
Answer: 79 CE

Question: In what county was glass with uranium oxide content found?
Answer: Italy

Question: What color of ceramic glaze was extracted from uranium oxide?
Answer: yellow

Question: In what year was yellow uranium oxide glass discovered?
Answer: 1912

Question: What institution did R.T. Gunther belong to?
Answer: the University of Oxford

Question: What was the first self-sustained nuclear chain reaction created by human beings called?
Answer: Chicago Pile-1

Question: On what date was the first self-sustained nuclear chain reaction created artificially?
Answer: 2 December 1942

Question: What project was Fermi working for?
Answer: Manhattan

Question: On the campus of what educational institution was Chicago Pile-1 created?
Answer: University of Chicago

Question: How many metric tons of uranium oxide was used in Chicago Pile-1?
Answer: 53

Question: Along with lemon yellow, what color is produced in uranium glass?
Answer: orange-red

Question: Who discovered uranium in pitchblende?
Answer: Martin Heinrich Klaproth

Question: Who was responsible for first isolating uranium?
Answer: Eugène-Melchior Péligot

Question: Who discovered that uranium was radioactive?
Answer: Henri Becquerel

Question: What was the first nuclear weapon used in a war called?
Answer: Little Boy

Question: What percentage of uranium in nature is uranium-235?
Answer: 0.7204%

Question: What is the term for the amount of uranium-235 needed to sustain a nuclear chain reaction?
Answer: critical mass