0
7.64
it is the half life of radon-222 multipled by 2
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How many days are required for 200 grams of radon-222 to decay to 50.0 grams?
7.64 days
How many days are required for 200 grams of radon 222 to decay to 50.0 grams?
Radon-222 has a half-life of about 3.8 days. To calculate the time required for 200 grams of radon-222 to decay to 50 grams, you can use the formula: [N = N_0 \left(\frac{1}{2}\right)^{\frac{t}{t_{1/2}}}] where N is the final amount (50 grams), N0 is the initial amount (200 grams), t is the time in days, and t1/2 is the half-life. Solving for t gives around 7.6 days.
How many days does it take for 32 grams of palladium -103 to decay to 2.0 grams the half - life of palladium -103 is 17 days?
It would take 51 days for 32 grams of palladium-103 to decay to 2.0 grams. This calculation involves multiple half-lives, as every 17 days half of the remaining material decays. By dividing the initial mass by 2 repeatedly until you reach 2.0 grams, you find that it takes 3 half-lives for the decay to occur.
What is the half life of a radioactive isotope if it takes 6.2 days for a 72 gram sample to decay to 18grams?
18 grams are one fourth of the original sample mass of 72 grams. Accordingly, the half life is 6.2/4 = 1.55 days.
How many days must elapse for a 0.80 Mg sample of iodine-131 in the thyroid to decay to 0.10 Mg?
The time required is 24.06 days. The half life of iodine 131 is 8.02 days.
How much time is required for a 6.95 sample of to decay to 0.850 if it has a half-life of 27.8 days?
The time required for a 6.95 sample to decay to 0.850 if it has a half-life of 27.8 days is 255 days/ Radioactive decay is based on half-lifes, specifically the reciprocols of powers of 2. The equation for decay is... AN = A0 2(-N/H), where A is activity, N is number of half lives, and H is half life. Calculating for the question at hand... 0.850 = 6.95 2(-N/27.8) 0.122 = 2(-N/27.8) log2(0.122) = -N/27.8 -3.04 = -N/27.8 N = 9.16, or TN = (9.16) (27.8) = 255
30 gram of a radioactive substance that has a half-life of 2 days after 2 days how much will be left?
With radioactive decay, predicting when any individual atom will decay is nearly impossible. However, when a lot a particles are present, then it is possible to get a general idea of how much will decay in a certain period of time. The half-life is this measurement, and it is the time that it takes for one halfof the substance to decay. Hence half-life or how long it takes for half to "die".For any size sample of a substance, the half-life is how long it takes for half to be left, so for a substance with a half-life of 2 days, half of the substance will decay in two days. Therefore your answer is simply half of 30g which is 15g.Additional reading: http://simple.wikipedia.org/wiki/Radioactive_decay
Does fermium-257 undergo nuclear decay?
Alpha decay to californium 253. The half life of fermium 257 is 100.5 days.
The radioactive decay constant is days-1 if the radioisotope has a half-life of 431 days?
0.00161
The radioactive decay constant is days-1 if the radioisotope has a half-life of 163 days?
0.00425
The radioactive decay constant is days-1 if the radioisotope has a half-life of 52 days?
0.013
The radioactive decay constant is blank days -1 if the radioisotope has a half-life of 52 days?
0.013
