The half-life of Po-214 is 0.001 seconds. How much of a 10-gram sample is left after 0.003 seconds? # of Fraction mass days/time Half-Lives Remainin Remaining 9 100% 1/1 1 HL 50% 1/2 2 HL 25% 1/4 3 HL 12.5% 1/8 4 HL 6.25% 1/16 5 HL 6.259%/2 1/32Gold-198 has a half life of 2.7 days. Complete the table for an initial sample size of 200 grams. TIME ELAPSED AMOUNT REMAINING 0 days 200 grams 27 days5 The graph below shows the breakdown of radon-222. What is the half-life of Rn-222? 70 What fraction of the original sample will be left after Counts par minute 3 half-lives? 30 18 10 Time (Days he hendy Science-Jeachan 20206 How much of a 500g sample of potassium-42 is left after 37.2 hours if the half-life of potassium-42 is 124 hours.7 How much of a 100-gram sample of gold-198 is left after 810 days if its half life is 2.7 days? ofke hendy Science teacher, 2020Half-Life practice The table below shows the radioactive decay of a a What percent of iodine is left after 5 half live have 600g sample of iodine-125. passed? b. What percent of iodine-125 has decayed if there are Time % of Parent hotape Fraction of Parent Mann () of Parent [days) Remaining Isotope Remaining Isotope 375 grams of the original sample left? c. What is the half life of iodine-125? 0 100% 1/1 600 60 1 50% 300 d What mass of the iodine-125 has decayed after b half-lives? 120 2 25% 150 180 3 12.5% 1/8 75 e. What fraction of the iodine-125 remains after 300 days have passed? 240 4 6.25% 1/16 37.5 300 5 3.125% 1/32 18.75 f. How many half lives would have to pass for there to be only 12 grams remaining? 360 6 1.56% 1/64 9.4Half-Life practice Create a graph that represents how a radioactive element will decay. 1011 ' of original mass remaining 10