m a A balloon is lled with air and tied. This balloon is placed in the school basement and lett there for a week so that it can absorb the radon gas. in The balloon is brought back into the lab at 3 pm. on Tuesday. Using a Geiger counter. the radon gas in the ballnon was found to make 840 emissions in | minute. a The balloon is then left in the lab overnight. At 3 pm Wednesday. the Geiger counter is used again and the reading was TOD emissions in l minute. Amlgsis: - Calculate the half-life of radon gas. {Ne-1e: You can use guess and check to 1 decimal place.) 0 If the original balloon had been left in the lab for 34 hours. calculate how many emissions would be emitted in 1 minute. In The decay series [or radon-222 is II. o. B', if, 0., [3'7 [ii 0.. Using 3 balanced nuclear equations, deteITninethe nal isotope in this series. Roughly sketch a decay series graph. mat-:5 number atomic number