WebbIodine-131 has a half-life of about 8 days. Express your answer using two significant figures. The half-life of iodine-131 is 8.02 days. How long would it take for 10% of a sample to decay in hours? If a sample starts with 500 grams of radioactive material that has a half-life of 125 years, how many grams would be left after 375 years? Webb1LCI 95% Half -life in days for the lower limit of the confidence interval; 2UCI 95% Half life in days for the upper limit of the confidence interval; 3temperature was slowly increased so that in about 3.5 h, the internal temperature of the ham was 69°C; 4Canned meat was prepared in compliance with the specification of RF State
Half-life plot (video) Nuclei Khan Academy
Webb4 jan. 2024 · In order to use our 1/2 life calculator you'll need the following data:. The half time of a given drug – this input can be either in minutes, hours, or days. The calculator will set the unit of the result automatically. If you don't know the half-life of the drug, take a look at our table below.. Dosage – the amount of the drug administered at the very start. Webb13 maj 2024 · Mass after 42 days, #N# =0.25 g #i.e# mass left undecayed we have, #N/N_0=1/2^n#, where #n# is number of half lives occured(the number of times it disintegrated into half of original) #=>0.25/2=1/2^n# #=>1/8=1/2^n# #=>n=3# #=># number of half lives occured in 42 days is 3 if half life is #t_(1/2)# then #3t_(1/2)=42# or … truhearing select plan
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WebbUseful for calculating today's activity for any radioactive isotope. You may also back decay sources to find out the original activity (or for any date), knowing the current activity. If the isotope that you wish to decay is not on the drop down list, check the 'not listed' check-box and manually enter the isotope name and its half-life to ... Webb14 dec. 2024 · 131 I decays with a half-life of 8.02 days with beta particle and gamma emissions. As it decays, it may cause damage to the thyroid. The primary risk from exposure to high levels of 131 I is the chance occurrence … WebbThe iodine-131 has a half-life of 8.02 days (692928 sec), and therefore its decay constant is: Using this value for the decay constant, we can determine the activity of the sample: 3) and 4) The number of iodine-131 atoms that will remain in 50 days (N 50d ) and the time it will take for the activity to reach 0.1 mCi can be calculated using the decay law: truhearing select program