United States has sufficient uranium.
More than 99%of naturally occurring uranium is U-238. The valuable U-235 makes up less than 1% of uranium, and must be "enriched" in complicated processes.
Uranium hexafluoride is not the most abundant compound found in living things.
Thorium is abundant than uranium in nature. It can be used to generate power.
Natural francium exist in uranium and thorium ores.
Uranium consists primarily of two isotopes: uranium-235 and uranium-238. These isotopes are naturally occurring and are radioactive. Uranium-235 is the more fissile isotope for nuclear reactions, while uranium-238 is more abundant but less reactive.
USA has uranium from national mines or from imports.
Uranium-235 and uranium-238 are isotopes of uranium, meaning they have the same number of protons but different numbers of neutrons. Uranium-235 is used in nuclear reactors and weapons due to its ability to sustain a nuclear chain reaction, while uranium-238 is more abundant in nature but less useful for these purposes.
Francium has no stable isotopes. That means it doesn't really have a "most abundant" isotope; they're all pretty much nonexistent. There are trace amounts of 223Fr in uranium minerals, because it's a decay product of 227Ac (which is itself a decay product in the decay chain of uranium).
Neptunium is an artificial chemical element; in the nature infinitesimal amounts of neptunium are possible in uranium ores.
It is impossible to know exactly this value; probably approx. 5.109 tons. But only a very small part of this quantity is economically to extract today.
The largest reserves of uranium are in Australia.
Yes, uranium is considered a common actinide. It is the most abundant actinide in the Earth's crust, primarily found in minerals like uraninite. Uranium has significant applications in nuclear energy and weapons, making it well-known compared to other actinides. Its isotopes, particularly uranium-235 and uranium-238, are crucial for nuclear fission processes.