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How many half-lives have passed in a rock containing one eighth of the original radioactive material and seven eighths of the daughter product?
Wiki User
∙ 11y ago
3 half-lives
Wiki User
∙ 11y ago
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What is the term for rock containing a metal or other useful mineral that can be mined and sold at a profit?
Rock material mined for its constituent elements or minerals is called "ore."
What is the coldest material on earth?
- for a natural material: a stone from Antarctic- for a manmade material: solid helium
How is heat made from the core?
The inner core of the Earth is believed to be composed of iron and nickel, with a dash of other heavy metals. Several of these are radioactive, and this fission creates heat. Studying seismic waves that have travelled through the core, gives us data and it from this that the above interpretation is made. The inner core is thought to be solid on account of the extremely high pressures. Surrounding this is the outer core, which is at roughly the same temperature (because of conduction), but under less pressure, is liquid. From this material the volcanic magma comes. Eventually, the radioactive core will cool down, the volcanoes will cease, and Plate Tectonics will draw to a halt.
What is the material of adding some impurities to semiconductor material?
Its called doping.
What is a material that conducts electric current slowly?
Material with high resistance
What is an autoradiograph?
An autoradiograph is a photographic image produced by placing a film in contact with a specimen containing radioactive material.
What is the bullet in a fission reaction?
An electron is fired into the reactor core containing the radioactive material, usually uranium, and as it hits the radioactive nucleus the uranium atom breaks down forming two daughter nuclei and emitting another electron (beta radiation particle) which continues as a chain reaction.
What happens to a radioactive material over time?
It disintegrates into its daughter nuclei that are much more stabler than the radioactive nuclei. If a sample of radioacictive material is left it will decay into another element over a period of time. Note that complete decay is not possible. A fraction of the original radioactive material will always remain in the sample.
What happens to the decayed portion of a radioactive element after the element reached it's half life?
When a radioactive material undergoes radioactive decay, except spontaneous fission, a daughter product is formed. The daughter may or may not be radioactive. If it is, this daughter product begins its own evolution according to its decay scheme and its own half-life. Any daughter products from that decay event will either be stable or will decay according to how (un)stable the daughter is and what its half-life happens to be. The original radionuclide continues to decay in its own way. You can see a "dynamic" developing here. The fact that a radioactive material has a half-life doesn't speak to what happens to the material or to its daughter products. It is only a measure of the rate of decay of a material. Radioactive materials decay according to what they are, and their daughter products will, if they are not stable, undergo decay as well, each according to its own decay scheme. The half-life only puts a timeline on things. And it (the half-life idea) must be applied to each unstable daughter. A consequence of radioactive decay and inspection of the daughter products allows us to use radioactive decay schemes to date materials. There are a number of radionuclides that are useful in doing this, and the decay schemes are well known. We understand the decay rates of the original material and also its daughters, and by counting all of them, we can "rewind time" to the period when they were isolated and state with good accuracy when the material was sequestered. Different methods of dating materials might be applied, depending on the material and its age.
When a material goes through radioactive decay there is a new daughter product in the solid material so can this new daughter material react chemically with the rest of the solid matrix around it?
Yes, this new daughter is a different chemical element and will react differently chemically than the precursor element.
What is an autoradiogram?
An autoradiogram is another word for an autoradiograph - a photograph image produced by placing a film in contact with a specimen containing radioactive material.
Can radioactive be recycled?
Yes, there are a number of uses for radioactive material. It depends on the type of radioactive material.
How many half-lives have occurred in a rock containing one-fourth parent material and three-fourths daughter material?
2 half-lives have.
What waste products come from power stations?
Radioactive waste is a waste product containing radioactive material. It is usually the product of a nuclear process such as nuclear fission, though industries not directly connected to the nuclear power industry may also produce radioactive waste.
What counts radioactive material?
We often use a Geiger counter to detect and count the decay of radioactive material.
What process ensures that the daughter cells contain the same genetic material as the parent?
Mitosis. The parent nucleus splits into two daughter nuclei containing chromosomes identical to that of the parent cell.
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.
