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Can a sample of matter change its composition or state?
For chemical reactions, the elements in a sealed vessel will not change. But, reactions can take place that would tend to take the sample to a state of equilibrium. Or, with heating or cooling the physical state can be changed.Another type of reaction is nuclear decay, in which radioactive substances will spontaneously decay to other radioactive substances, or decay to non-radioactive substances, thus actually changing the elements present.
How many years will it take for 10 g of radioactive uranium to decay into 5 g of radioactive uranium?
5,730 years
What is radioactive half-life used for?
to determine how long it will take to half of nuclids to decay, having use in radioactive materials operations
If the half-life of a radioactive substance is 10 hours how long will it take for 50 percent of it to decay?
The half-life of a radioactive isotope is defined as the time taken for the isotope to decay to half of its initial mass. So to decay to 50 percent of its initial mass will take one half-life of the isotope. One half-life of the isotope is 10 hours so the time taken to decay is also 10 hours.
When an atom undergoes radioactive decay when does it become a completely different element?
An atom of a given isotope will undergo radioactive decay whenever it feels like it. No joke. The nucleus of a radioactive isotope is unstable. Always. But that atom has no predictable moment of instability leading immediately to the decay event. We use something called a half life to estimate how long it will take for half a given quantity of an isotope to undergo radioactive decay until half the original amount is left, but this is a statistically calculated period. No one knows how long it will take a given atom of a radioactive isotope to decay, except that those with very short half lives will pretty much disappear relatively quickly.
What do you mean by radio active half life?
In any radioactive substance, individual atoms will decay randomly. There is no way to know exactly when any particular atom will decay. On average and in broad terms, however, we can predict how many atoms will decay in any given period of time, and this time varies with the isotope involved. The "half-life" of a radioactive substance is the time that it will take for half of the atoms to decay. Very radioactive isotopes will decay quickly and will have very short half-lives; slightly radioactive isotopes will decay slowly and have long half-lives.
Nuclear power how long does the radioactive source take to decay?
It depends on the radioactive source half life. refer to the related question below for more information.
When does an isotope undergo Decay?
An atom of a given isotope will undergo radioactive decay whenever it feels like it. No joke. The nucleus of a radioactive isotope is unstable. Always. But that atom has no predictable moment of instability leading immediately to the decay event. We use something called a half life to estimate how long it will take for half a given quantity of an isotope to undergo radioactive decay until half the original amount is left, but this is a statistically calculated period. No one knows how long it will take a given atom of a radioactive isotope to decay, except that those with very short half lives will pretty much disappear relatively quickly.
How many years will it take for 10g of radioactive uranium to decay into 5g of radioactive uranium?
Depending on the isotope: - for 235U: 7,038.108 years - for 238U: 4,468.109 years etc.
How long does it take geothermal energy to form?
Millions of years. The geothermal energy is gradually recharged by the decay of radioactive isotopes.
What are the properties of radioactive particles?
Radioactive materials have unstable nuclei. That's what makes them what they are. The nucleus of a radionuclide will eventually decay. The time that must pass before this happens, and the manner in which the decay will take place vary from one radioisotope to another. As regards the length of time to decay, we cannot know for a given atom of a radionuclide just when it will decay. Certainly we can (and do) find what is called a half-life for each radioisotope. This is a statistically arrived at "average" for the length of time it will take for a given radioisotope to "lose" half its mass to decay. While we can't know when a given atom of something will decay, we can find, and with a great deal of accuracy, the length of time it will take for half of a large number of atoms of a given radionuclide to decay. When it comes to modes of radioactive decay, there are several, and each radioisotope has one of the modes as its own (though there are a few radionuclides that have a couple of different possible decay schemes). The decay schemes are spontaneous fission, alpha decay, beta decay (several kinds), proton emission, double proton emission, neutron emission, and cluster decay. This short post hits the nail on the head. More information is certainly out there, and Wikipedia has some good stuff posted. You'll find a link below to material that is on point.
What happens when you fall in radioactive liquid?
Your gender changes. ======================= Unlike the first contributor's answer which seems to only take place in science fiction, the most likely solution would be death.
