0
What else can I help you with?
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 much of a radioactive substance remains after 10 hours if its half life is 5 hours?
After 10 hours, 25% of the radioactive substance remains because each half-life reduces the amount by half. So, after the first 5 hours, 50% remains, and after the next 5 hours, half of that amount remains, which is 25%.
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.
The half life of Rn-222 is 4 daysWhat was the original mass of a sample of this isotope remains after 21 hrs?
The half-life on 222Rn86 is 3.8235 days. A sample of this isotope will decay to 0.8533 of its original mass after 21 hours. AT = A0 2(-T/H) AT = (1) 2(-21/(24*3.8235)) AT = 0.8533
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 a radioactive tracer is used why is it best to use a radioactive isotope that decays into a stable isotope?
The principle behind the use of radioactive tracers is that an atom in a chemical compound is replaced by another atom, of the same chemical element. The substituting atom, however, is a radioactive isotope. This process is often called radioactive labeling.
Is technetium 43 real?
Yes, technetium-43 is a real isotope of technetium. It is a radioactive isotope with a half-life of about 3.9 hours. It is not commonly found in nature but can be produced artificially in nuclear reactors.
Describe about the stability of astatine?
All the isotopes of astatine are radioactive and unstable; the most stable isotope is 210At with a half life of 8,1 hours.
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 one half-life for half of the radioactive sample to decay. Since half of the sample has decayed after 16.5 hours, it will take another 16.5 hours for the remaining half to decay, totaling 33 hours to decay three fourths of the original sample.
What is an atom of sodium 24?
An atom of sodium-24 is a specific isotope of sodium that contains 11 protons, 13 neutrons, and 11 electrons. It is a radioactive isotope with a half-life of about 15 hours, commonly used in nuclear medicine for various applications.
Is the element Th radioactive?
Thorium (Th - atomic number 90) is mildly radioactive. 232Th, the only isotope found in abundance, has a half life of 1.4 x 1010 years, making it only mildly radioactive. It fissions through alpha decay into 228Ra (Radium). The most radioactive isotope of Thorium is 231Th, which decays into 231Pa (Protactinum) through beta emission with a half life of 25.5 hours, however 231Th is found only in trace quantities naturally.
What Contains 22 protons and 21 neutrons.?
An element with 22 protons is titanium (Ti), as the number of protons determines the atomic number of an element. With 21 neutrons, this specific isotope of titanium is titanium-43 (Ti-43). This isotope is radioactive and has a half-life of about 22.3 hours.
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?
The half-life of the isotope is 16.5 hours, so it takes 16.5 hours for half of the sample to decay. To find the time it takes for three fourths of the sample to decay, you would calculate 2 half-lives (2 x 16.5 hours) as three fourths is equal to 1.5 times the original amount (1 + 0.5). Therefore, it would take 33 hours for three fourths of the sample to decay.
What is the duration of Radioactive Dreams?
The duration of Radioactive Dreams is 1.63 hours.
Does a cold nodule in the thyroid mean cancer?
If an endocrinologist asks you to undergo a thyroid uptake scan, you will have to take a small amount of radioactive isotope that will get absorbed by the thyroid gland. Within 24 hours of swallowing the radioactive isotope, pictures will be taken of your thyroid. This test helps to determine if a thyroid nodule is an active part of the thyroid tissue or not. When the nodule comes back as 'cold' this means that it didn't absorb as much of the radioactive isotope; as it would be expected by tissue that is an active part of the thyroid gland. A 'cold' nodule doesn't necessarily mean that you have cancer. It just means that your doctor might want to undergo further testing to determine if there is a need to monitor the nodule or surgically remove it.
Is lawrencium radioactive?
Lawrencium probably has some similar chemical properties as the other actinides; unfortunately no data now. Only the compound LrCl3 is known.
