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What is the half life of a radioactive substance if it takes 6 hours for 50 percent of it to decay?
Wiki User
∙ 14y ago
That is the half-life - the 6 hours in this case.
That is the half-life - the 6 hours in this case.
That is the half-life - the 6 hours in this case.
That is the half-life - the 6 hours in this case.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoIt 75% of a substance decays in 6 hours, the half-life of that substance is 3 hours. The way it works is that in three hours, half the original substance decays. In another 3 hours, half of the remaining material decays. That means that in 6 hours (two half-lives), one half and then one quarter of the original sample will decay, and that adds up to three quarters (75%) of the original sample decaying.
Wiki User
∙ 13y ago6 Hours.
The half life is the period of time it takes for 50% (half) of a substance to decay.
Wiki User
∙ 12y ago6.25% = 0.0625 = 1/16 = (1/2)4, showing that 4 half-lifes have elapsed.
One half-life is 76.5/4 = 19.125 hours = 19hours 7minutes 30seconds
Wiki User
∙ 14y agoThat is the half-life - the 6 hours in this case.
Wiki User
∙ 13y ago12.5 hours.
Wiki User
∙ 13y ago3 hours
Wiki User
∙ 13y ago6 hours
Wiki User
∙ 12y ago40 min
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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.
What is a radioactive element's half-life?
The time it takes for a half of the element to decay. In Example: Technetium-99 has a half life of 6 hours. If you begin with a sample of 100g, then after 6 hours you will have 50 grams, at 12 hours you will have 25 grams and so on; however it will NEVER reach 0 (it will remain in exponentially small ammounts because of the asymptote in the graph). This specific exponential decay is shown by the equation y=100(0.5)((1/6)x)
How long does it takes a radioactive material to decay?
Nuclear explosions produce both immediate and delayed destructive effects. Immediate effects (blast, thermal radiation, prompt ionizing radiation) are produced and cause significant destruction within seconds or minutes of a nuclear detonation. The delayed effects (radioactive fallout and other possible environmental effects) inflict damage over an extended period ranging from hours to centuries, and can cause adverse effects in locations very distant from the site of the detonation. Further reading: http://nuclearweaponarchive.org/Nwfaq/Nfaq5.html http://en.wikipedia.org/wiki/Nuclear_fallout
How much of a radioactive substance remains after 10 hours if its half life is 5 hours?
Since half of the atoms of the original substance will have decayed after 5 hours, half of what is left will have decayed after the next five hours. The answer is 0.25 or one fourth of the original atoms will remain.
How much of a radioactive substance remains after 24 hours if its half life is 5 hours?
Using the formula Nt = N0*(1/2)t/t1/2 where Nt is the amount of stuff remaining after an amount of time, t, and t1/2 is the half-life, you get Nt = .036N0. So about 3.6% of the radioactive stuff is left.
What is a half-life of radioactive substance if it takes 6 hours for 50 percent of it to decay?
6 hours. you have a hot one there!
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.
If the half life of a radioactive substance is 10 hours how long will it take for 75 percent of it to decay multiple choice question is it 15 hours 10 hours 5 hours or 20 hours?
Its 5 hours. 50% of the substance is decayed at 10 hours (that is what half life means. It's full life is 20 hours). Multiple 75% times 20 hours to find that 75% is 15 hours. Subtracrt 15 hours from 20 hours to get the answer of 5 hours for the decay of 75% of the substance.
A pure radioactive substance has a half-life of 3 hours. How long would it take a mass of 12g of that substance to decay to 3g?
Twice the half-life.
How much of a radioactive substance remains after 5 hours if it's half-life is 5 hours?
6.25
Determine the amount of time it takes for three fourths of a radioactive sample of an isotope of bromine to decay the half-life of the isotope is 16.5 hours?
About 33 hours
What is a radioactive element's half-life?
The time it takes for a half of the element to decay. In Example: Technetium-99 has a half life of 6 hours. If you begin with a sample of 100g, then after 6 hours you will have 50 grams, at 12 hours you will have 25 grams and so on; however it will NEVER reach 0 (it will remain in exponentially small ammounts because of the asymptote in the graph). This specific exponential decay is shown by the equation y=100(0.5)((1/6)x)
How much of radioactive substance remains after 15 hours if it's half life is 5 hours?
The half-life of a radioactive substance is the time that it takes for half of the atoms to decay. With a half-life of 10 days, half has decayed in this time. After 20 days, a further 10 days/another half life, a further half of the remainder has decayed, so 1/4 of the original material remains, 1/4 of 15g is 3.75 grams. This is the amount of original radioactive substance remaining, but it’s daughter isotope ( what the decay has produced ) is also present, so the original sample mass is effectively constant, especially in a sealed container. Even in an unsealed container, and assuming alpha ( helium nucleii) emission, a drop in mass per radioactive atom of 4 Atomic Mass units, compared with the original atom of, say 200 amu is only 2% mass decrease, less for heavier decaying nucleii.
How long does it takes a radioactive material to decay?
Nuclear explosions produce both immediate and delayed destructive effects. Immediate effects (blast, thermal radiation, prompt ionizing radiation) are produced and cause significant destruction within seconds or minutes of a nuclear detonation. The delayed effects (radioactive fallout and other possible environmental effects) inflict damage over an extended period ranging from hours to centuries, and can cause adverse effects in locations very distant from the site of the detonation. Further reading: http://nuclearweaponarchive.org/Nwfaq/Nfaq5.html http://en.wikipedia.org/wiki/Nuclear_fallout
How much of a radioactive substance remains after 10 hours if its half life is 5 hours?
Since half of the atoms of the original substance will have decayed after 5 hours, half of what is left will have decayed after the next five hours. The answer is 0.25 or one fourth of the original atoms will remain.
What is the amount of time it takes for three fourthsof a radioactive sample of an isotope of bromine to decay if the half life of the isotope is 16.5 hours?
It takes 2 half lives for an isotope to decay to 0.25 of its original value. If the half life is 16.5 hours, then 2 half lives is 33 hours. AT = A0 2(-T/H)
What is the half life of a radioactive substance if 2.4G decays to 1.80G in 66 hours?
The half-life of a radioactive substance that decays from 2.4g to 1.8g in 66 hours is 159 hours. AT = A0 2(-T/H) 1.8 = (2.4) 2(-66/H) 0.75 = 2(-66/H) log2(0.75) = log2(2(-66/H)) -0.415 = -66/H H = 159
