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No, it's a long chain. The decay sequence is: Uranium-238 to thorium-234 to protactinium-234 to Uranium-234 to thorium-230 to radium-226 to radon-222 to polonium-218 to lead-214 to bismuth-214 to polonium-214 to lead-210 to bismuth-210 to polonium-210 to lead-206 which is its final stable form. Radioactive decay occurs when an unstable (radioactive) isotope transforms to a more stable isotope, generally by emitting a subatomic particle such as an alpha or beta particle (helium nucleus or electron). The half-life of one of the elements above can be shorter than a millisecond (Po-214) or as long as 4.5 billion years (U-238).
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How much uranium is left if a solid piece exists for one half-life?
Half life is the time taken for half the atoms to decay. Whatever mass you start with, if it is a sample consisting of one pure uranium isotope, you will have half that mass of uranium after one half life. The piece of metal will not weigh half of the original mass, because the decay products will be there. In practice, a piece of uranium usually consists of a mixture of isotopes with different half lives.
After one half-life what percent of the original uranium remains?
By definition, 50%. Half life is the time for half of the original sample to decay.
How long does it take a 5 gram sample of Uranium -235 to decay to a mass of 2.5 grams?
700 million years
What element has an atomic number of 94?
Actinium is a meta element. Atomic number of it is 89.
Is half life the same for each isotope?
The term half life describes the rate at which the isotopes of a particular atom decay. Thus, if you have a lump of Uranium 238 (U238), then the atoms in the lump will decay at the same rate as the half life. If that lump was created four billion years ago and it consisted of 100% U 238, today the lump would be half U238 and half something else, mostly lead. That would go for both the atoms and the whole lump. If the lump consisted of 10% U238 today it would consist of 5% U238, and 95% something else. The fact that the U238 has a half life of 4 billion years only affects the Uranium and nothing else.
Why is lead found in all deposits of uranium ores?
Uranium has a half life of 5,600 years. After that period, one half of the uranium becomes lead. That is why lead is found in uranium deposits.
How many years would it take for half of the atoms in uranium to change into lead?
The half-life of 214Bi is 19.7 minutes. However, it has two decay modes, neither of which leads directly to lead; that complicates things. One of the decay modes leads to 214Po, which then quickly (half-life 0.0016 seconds) decays to 210Pb. The other one leads to 210Tl, which has a half-life of 1.3 minutes and also decays to 210Pb. So: Half of the 214Bi will be gone in 19.7 minutes; a bit after that half the sample will be 210Pb.
Radium is one of the alkaline earth metals -However its only natural source is uranium-why?
Because radium is a decay product of uranium or thorium.
What is one of the daughter elements of urainium-238?
U238 is a stable isotope of uranium - it doesn't undergo decay except at a very very slow rate unless hit with Neutrons - then it will decay to Neptunium
How much uranium is left if a solid piece for one half life?
Half life is the time taken for half the atoms to decay. Whatever mass you start with, if it is a sample consisting of one pure uranium isotope, you will have half that mass of uranium after one half life. The piece of metal will not weigh half of the original mass, because the decay products will be there. In practice, a piece of uranium usually consists of a mixture of isotopes with different half lives.
How much uranium is left if a solid piece exists for one half-life?
Half life is the time taken for half the atoms to decay. Whatever mass you start with, if it is a sample consisting of one pure uranium isotope, you will have half that mass of uranium after one half life. The piece of metal will not weigh half of the original mass, because the decay products will be there. In practice, a piece of uranium usually consists of a mixture of isotopes with different half lives.
How long does it take a 5-gram sample of uranium- 235 to decay to a mass of 2.5 grams?
One Half-Life :-)
How many elements are in uranium?
In a pure sample, one (uranium itself). In ores, traces of lead, thorium and rare earth elements are usually present.
After one half-life what percent of the original uranium remains?
By definition, 50%. Half life is the time for half of the original sample to decay.
Is uranium decaying an example of energy being converted from one form of energy to another?
Yes, decay process transform nuclear energy in to heat.
What is one similarity between uranium 238 and carbon 14?
238U and 14C are radioactive isotopes of natural chemical elements.
What radioactive decay of uranium?
The nucleus is too large to be stable. There is the theory of grouping of nucleons into alpha particles inside the nucleus and, through oscillations of the nucleus, one of these on one end of the nucleus can be repelled with a great enough force to push it out of the nucleus.
