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Why is radioactive waste considered safe after 10 half lives?
I would consider it safe after 5 half-lives. by 5 it has decayed to 3% of original level, by 10 it has decayed to 0.1% of original level.
How do radioisotopes of an element differ feom other isotopes?
Radioisotopes are "radioactive isotopes"; they are not stable. Radioactive atoms will decay, or break apart into other atoms, by emitting an electron, or a neutron or a positron or an alpha particle (2 protons and two neutrons). The rate at which this happens is measured by the "half-life"; after one half-life, half of the atoms will have decayed. After another half-life, half of the remaining atoms will have decayed. Atoms with short half-lives are highly radioactive, and can be fairly dangerous. Atoms with long half-lives are only slightly radioactive, and aren't all that dangerous.
How does a sample of radioactive waste decay to a nonhazardous level?
All radioactive material has a characteristic half-life. This is a period during which half the matter from the original mass will have decayed into a daughter element. Either the daughter element is non-radioactive and therefore non-hazardous or it is radioactive and has its own half-life. The total radioactivity thus reduces over time and at some stage is deemed to reach a non-hazardous level.
What is the color of Ushers house?
Usher's house, from Edgar Allan Poe's "The Fall of the House of Usher," is described as having a "bleak" and "white" appearance, with a gray tarn surrounding it. The overall atmosphere is gloomy and decayed, reflecting the story's themes of despair and madness. The color contributes to the eerie and foreboding mood of the narrative.
Can nuclear waste catch on fire?
The USSR had a nuclear waste dump have a steam explosion at a site called Chelabinsk-40 in the late 50s, when decay heat melted snow above the dump saturating it with water and bringing it to criticality. Note it did not have a nuclear explosion, just a steam explosion. However it scattered radioactive mud over a large area, requiring evacuation of several villages.
What is the destiny of neptunium?
Being radioactive neptunium is decayed down to a stable isotope.
What is the radioactivity for lead?
The main lead isotopes 206Pb, 207Pb and 208Pb, are not radioactive. It does have traces of radioactive isotopes, but the quantity is so small that lead's radioactivity can be considered zero. It is however toxic if ingested.
How does half life work in the context of radioactive decay?
In the context of radioactive decay, half-life is the time it takes for half of the radioactive atoms in a sample to decay. This means that after one half-life, half of the original radioactive atoms have decayed, and after two half-lives, three-quarters have decayed, and so on. The concept of half-life helps scientists understand the rate of decay of radioactive substances.
When will the Earth be hospitable again after nuclear war?
If the entire world is affected by the various explosions, it could be thousands or millions of years before the radioactive isotopes have decayed enough as to emit levels of radiation that wouldn't harm living creatures.
How does decayed waste matter pollute the air?
by releasing poisonous gases into the atmosphere
Over time what will happend to the radioactive atom?
They experience radioactive decay. They emit radiation, changing the state of their nucleus, usually by the loss of protons and neutrons. However, this process is completely random; it can only be predicted as a half-life, or the amount of time it takes half of a certain material to decay. This does not predict when an individual atom will decay, it only predicts when approximately half of the material will have decayed.
Why is radioactive waste considered safe after 10 half lives?
I would consider it safe after 5 half-lives. by 5 it has decayed to 3% of original level, by 10 it has decayed to 0.1% of original level.
When three-quarters of a radioactive isotope has decayed to become the stable daughter product how many half lives have occured?
When three-quarters of a radioactive isotope has decayed, it means that 1/4 (or 25%) of the original isotope remains. This corresponds to 2 half-lives, because each half-life halves the amount of radioactive material remaining.
What is the difference between a simulation and actual radioactive decay?
A simulation is a computer-generated model that mimics real-world processes, such as radioactive decay, using mathematical algorithms. Actual radioactive decay is a natural process where unstable atomic nuclei lose energy by emitting radiation. While simulations provide insight into how radioactive decay works, real decay occurs spontaneously and cannot be controlled or manipulated like in a simulation.
What part of a radioactive sample remains unchanged after 2 half lives?
After 2 half lives, 25% of the original radioactive sample remains unchanged. This is because half of the sample decays in each half life, so after 1 half life, 50% has decayed, and after 2 half lives, another 50% has decayed, leaving 25% unchanged.
How does the atomic bomb affect the environment?
Point 1: Water is contaminated. This is cause after the radioactive particles (NOT found in the radio sets!. oh-it is harmful to living things too!) being released by A-bomb, it went to the soil and, when the rain comes (usually immediately after the explosion, as the result of huge heat energy being released where water found on soil were evaporated immediately.), the particle flows to seas or rivers. This causes all the marine life to die in matter of time.Point 2: The area is nuked that too much radioactive particles will kill including humans. So no one can live the nuked area for years. Point 3: As the soil is contaminated by the radioactive particles, the soil could not grow crops. All plants turns to lifeless.Point 4: All the effects wear down very slowly. Especially the natural bomb- The Uranium Bomb that requires millions of years as one half-life. One half-life meant half of the radioactive particles had decayed. When all have decayed,the radioactive particles are gone and life starts to grow back. Sadly,half-life is something no one could control.So let nature take its course. For the half-life of uranium-http://en.wikipedia.org/wiki/Uranium
What is the stable isotope that is formed by the breakdown of a radioactive isotope?
The stable isotope formed by the breakdown of a radioactive isotope is called a daughter isotope. This process is known as radioactive decay, where a radioactive isotope transforms into a stable daughter isotope through the emission of particles or energy.
