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Half Life Example Problems. An original sample of a radioisotope had a mass of 10 grams. An 80 milligram sample of a radioactive isotope decays to 5 milligrams in 32 days.
from venturebeat.com
Sodium 24 has a half life of 15 hours. Calculate the time required for 80% completion. Log 10 x 0 /x = kt/2.30.
(1/2) n = 0.96598 n log 0.5 = log 0.96598 n = 0.049935. Carbon 14 has a half life of 5 730 years. Half life period of a reaction: 100% minus 3.402% = 96.598% we will use it as 0.96598.
