How many iron atoms are in 0.550 mol of Fe2O3? What is the molar mass of aluminum acetate? How many atoms of oxygen are in one formula unit of Al(NO3)3? How many atoms does uranium-238 have? How many atoms of sulfur are there in one mole of sulfur dioxide?
If the atomic mass of an element is x, what is the mass in grams of 6.02 X 10^{23} atoms of the element? What is the atomic mass of carbon? What is the mass number of an atom? What is fermium's atomic mass number? How many neutrons does uranium 238 have?
Fire a neutron (1) at a large uranium-235 atom (2). You make an even larger, unstable radioactive isotope of uranium, uranium-236, that promptly splits into two smaller and more stable atoms krypton and barium (3). In the process, heat energy is released and there are three spare ...
Nuclear reactors bombard atoms of uranium-235 or plutonium-239 with neutrons, and as the atoms split, they produce energy and more neutrons, which can then split other atoms of uranium and plutonium in a chain reaction. Uranium-238 is also fissionable, but "fast" neutrons at higher energies...
The two atoms that result from the fission later release beta radiation (superfast electrons) and gamma radiation of their own, too [source: World-nuclear.org]. But for all of this to work, scientists have to first enrich a sample of uranium so that it contains 2 to 3 percent more U-...
The carbon-14 atoms decay and are replaced by new carbon-14 atoms at a constant rate. At this moment, your body has a certain percentage of carbon-14 atoms in it, and all living plants and animals have the same percentage. Using the Radiocarbon Dating Method As soon as a living ...
Because atoms become more massive as you move from lower to higher atomic numbers in the periodic table, molar masses vary enormously, with that of uranium being over 200 times that of hydrogen.Moles and Equivalents The equivalent unit was introduced to account for the fact that when solutes di...
Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei. This illustration shows nuclear fission of uranium-235.Nuclear Power Nuclear bombs involve the forces — strong and weak — that hold the nucleus of an atom together, especially atoms with ...
In my 2015 book Atoms Under the Floorboards (p.106), I reprised the story of how amateur uranium prospectors used to sneak out with their Geiger counters, under cover of darkness, to try to find lucrative uranium deposits (read more in Finding Uranium in the Dark, Popular Science, July...
Both isotopes of uranium are naturally radioactive; their bulky atoms disintegrating over time. Given enough time (hundreds of thousands of years), uranium will eventually lose so many particles that it will turn into lead. This process of decay can be greatly accelerated in what is known as ...