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Radioactive Decay
Also known as nuclear decay, radioactive decay is the decrease of radiation through time.
540 Questions
Meitnerium is extremely unstable, with a half-life of only 7.6 seconds for its most stable isotope. Thus, properties such as flammability are difficult to ascertain.
What is the SI unit for quantity of radioactive materials?
- The SI unit for quantity of radioactive materials is Becquerel.
- The becquerel (symbol Bq) is the SI-derived unit of radioactivity.
- One Bq is defined as the activity of a quantity of radioactive material in which one nucleus decays per second.
Can you get disability for radiotracer uptake of the skeletal system?
You can't get disability for radiotracer uptake if the amount is calculated properly and if you drink good amounts of water after the medical analysis.
What can be emmited from radioactive decay?
Many particles can be emitted from radioactive decay.
We have Internal Conversion in which a nucleus transfers the energy to an electron which then releases it. There is also Isometric Transition which is basically the gamma ray (photon).
There is the decay in which a nucleon is emitted. In this scenario we can have an alpha decay (in which an alpha particle decays), a proton emission, a neutron emission, double proton emission (two protons are emitted), spontaneous fission (the nucleus brakes down into two smaller nuclei and/or other particles) and we have the cluster decay (where the nucleus emits a smaller nucleus).
There is the beta decay too. There is the Beta decay (electron and electron antineutrino are emitted), positron emission (a positron and an electron neutrino are emitted), electron capture (an electron is captured by the nucleus and a neutrino is emitted), bound state beta decay (the nucleus decays to an electron and an antineutrino but here the electron is not emitted since it is captured into a K-shell), double beta decay (two electrons and two antineutrinos are emitted), double electron capture (the nucleus absorbs two electrons and emits two neutrinos), electron capture with positron emission (an electron is absorbed and a positron is emitted along with two neutrinos), and double positron emission (in which the nucleus emits two positrons and two neutrons).
Is lead formed via nuclear decay?
yes, different isotopes of lead mark the endpoints of various decay chains.
Does nuclear radiation go away?
No, it doesn't.
Wrong, it does. There are 2 types of nuclear radiation: prompt & decay.
- Prompt nuclear radiation occurs for a period of time while the reaction that generates it is happening. Examples are the flash of neutrons, light, x-rays, etc. when a nuclear bomb explodes as well as the sustained neutron flux as a nuclear reactor is in operation. When the reaction stops, prompt nuclear radiation goes away.
- Decay nuclear radiation occurs as radioactive isotopes decay to different isotopes. As the decay happens (which is a probabilistic process) the radioactive isotope is consumed. This follows an exponential function with one half of the current amount of the radioactive isotope consumed in each period of time called a halflife. While there will always be a tiny residue of the original radioactive isotope, for practical purposes it is considered to be negligible after 5 halflives have passed. When 5 halflives of the radioactive isotope decaying have passed, decay nuclear radiation is considered to have gone away for practical purposes.
What type of nuclear decay results in the atomic number increasing by one with no change in mass?
Beta- decay result in an increase of atomic number by one, with no resulting change in the atomic mass number.
There is a change in mass, since an electron and an electron anti-neutrino is emitted, and also because the neutron changes into a proton, but the atomic mass number, per se, does not change.
Do hybrid cars emit radiation?
my most positive answer to this question is that i do not think hybrid cars emit radiation.
it just doesnt make sense.
They emit the same radiation any other car does: IR when the engine is running, visible light when the headlights are on, RF if you are using your CB radio, etc.
Are nuclear radiation and nuclear power the samething?
No, nuclear radiation has existed sense the first stars in the early universe began fusing hydrogen. Nuclear power is an industry created by man only in the early 1950s.
Why would you need a biopsy after a PET scan?
Most likely the PET scan images showed a suspicious growth or something and it was decided to biopsy it to determine what it actually was and if it needed to be removed or could be left alone.
What is the best definition of radioactive decay?
Radioactive decay is the spontaneous breakdown of a nucleus into smaller parts.
What can each type of nuclear decay be stopped by?
Alpha radiation consists of very heavy particles that can easily be stopped by a piece of paper. Beta radiation is much lighter and can be stopped by maybe 1/2 inch to 1 inch thick paper. Gamma radiation is high energy electromagnetic waves ( like x - rays) and can penetrate very much farther. Usually attenuation of gamma is referred to as tenth thickness or the thichness of a material that will decrease the amound of gamma rays penetrating it to 1/10 th of the original amount.
The use of scientific methods such as carbon dating to determine the age of an artifact?
Carbon dating is a scientific method that measures the decay of carbon isotopes in an artifact to determine its approximate age. By analyzing the ratio of carbon-14 to carbon-12, scientists can estimate how long ago the artifact was created or used. This method is often used in archaeology and anthropology to date organic materials like bones, wood, or plant fibers.
What Type of Decay occurs when Thorium -229 decay to form radium -225?
This process is called alpha decay.
Why can carbon dating not be used to date old knives?
However if the knife has a handle made of natural organic material (e.g, wood, bone, antler, ivory) this handle can be carbon-14 dated to obtain an estimate of the age of the knife.
What happens during radioactive decay apex?
An unstable nucleus loses particles until it becomes stable.
What type of radioactive decay is used in smoke detectors?
Most smoke detectors which operate alarms contain an artificially produced radioisotope: americium-241 in the form of americium dioxide. Americium-241 is made in nuclear reactors, and is a decay product of plutonium-241. It emits mostly alpha particles and relatively little harmful gamma radiation. The amount of americium in a typical new smoke detector is 1 microcurie or about 0.29 micrograms. The smoke detector works by using the americium as a source of ionizing radiation to ionize the air in an ionization chamber between two electrodes. The slightly ionized air allows a small current to be conducted between the two electrodes. When smoke enters the chamber, it absorbs some of the ionizing radiation, reducing or eliminating the current and triggering the alarm.
What is the formula for carbon dating?
Carbon radiometric dating is based on measuring the amount of carbon-14 isotope in a sample of carbon of organic origin (from a living thing that is now dead). In a living thing the amount of carbon-14 in its carbon remains at equilibrium with its environment (~1.5 PPB) which remains roughly constant due to the production of carbon-14 by cosmic ray impacts with atoms in the upper atmosphere. This carbon-14 is continuously decaying by beta decay to nitrogen-14, but by interconnection with its environment the lost carbon-14 is replaced.
Once the living thing dies however it is no longer interconnected to its environment and the decayed carbon-14 is no longer replaced. Carbon-14 decays with a halflife of 5730 years. By measuring the amount of carbon-14 in the sample and calculating how long on the exponential curve it took to drop from the equilibrium level it had when last alive to its current measured level, you get the age of the sample.
The technique is not perfect:
- for a variety of reasons the carbon-14 level in the environment is not actually constant over time, this requires checking carbon dating ages against other dating methods ages in many cases
- materials older than about 40000 to 50000 years old are usually not datable with carbon dating as the level of carbon-14 in the sample has decayed to low to be reliably measured with any accuracy
- of course it will not work on samples that do not contain carbon or which are contaminated with either carbon of nonorganic origin or ancient organic carbon (carbon in which all the carbon-14 has already decayed)
- etc.
Who discovered radioactive decay in 1898?
ernest Rutherford
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Radioactive decay was actually discovered in 1896 by Henri Bacquerel.
Ernest Rutherford discovered the formula of radioactive decay (Such as the falk-life, differences between alpha and beta decay and even how the elements become new elements after the decay), but he did not discover the radioactive decay himself.
How much radioactivity would be left after 6 hours for technetium if the half life is 6 hours?
After 6 hours 50 % of Tc-99m is disintegrated.
