The half-life of radon-222 is 3.823 days. What is the rate (decay) constant of this isotope? (Report your answer in standard notation. Only include the number in the answer box.)
k = ?????? day-1
The half-life of radon-222 is 3.823 days. What is the rate (decay) constant of this isotope?...
Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222 is 3.82 days. How many milligrams of a 59.9 milligram sample of radon-222 will be lost by radioactive decay during 7.64 days? mg
An isotope has a half-life of 20.37 days. What is its decay constant in units of s-1?
The rate constant for the decay of a radioactive isotope is 4.226 x 10-3/day. What is the half-life of of this isotope? 328.0 days O 410.0 days O 82.00 days O 164.0 days O none of these
A fossil was dated using rubidium-87, which undergoes beta decay and has a half-life of 4.75x1010 years. Calculate the age of the fossil if (5.7x10^1)% of rubidium-87 remains in the sample. Report your answer with 2 significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: X10 Answer units Question 2 (1 point) Thallium-201 is used to diagnose heart disease. The half-life of thallium-201 is 72.9 hours. If a patient takes 7.7 ug,...
1. The half-life of 2211Na is 950 days. What is its decay constant? Express your answer in s?1. 2.The isotope 8737Rb decays by beta emission. What nucleus is produced?
1. a certain isotope has a half life of 24.3 minutes. what is the decay constant (in s^-1) of this isotope? 2. You are told that a room contains an isotope with a half-life of 1.5 hours. If you need to wait until the isotope has decayed to 15% of its initial activity before entering the room, how long (in hours) must you wait
The isotope 143Pr undergoes beta decay with a half-life of 13.57 days. What fraction of 143Pr has decayed after 11.6 days?
. Of much concern to environmentalists is radon-222, which is a radioactive noble gas that can seep from the ground into basements of homes and buildings. Radon-222 is a product of the decay of radium-226 that occurs naturally in rocks and soil in much of the United States. Radon-222, which has a half-life of 3.8 days, decays by emitting an alpha particle. Radon-222, which is a gas, can be inhaled into the lungs where it is strongly associated with lung...
The activity of a sample of gas obtained from a basement containing radon-222 was found to be 8 pCi/L. This isotope has a half-life of 3.8 days. If no additional radon-222 entered the basement, how long would it take for the activity to decline to 1 pCi/L?
Answer is 1.25, but I am not sure how to do it Radon-222 undergoes a decay (t1/2 3.8 days) to form polonium-218. How long will it take for 0.200 mol of polonium-218 to form from 1.00 mol of radon-222? (1) 1.25 days 2)1.00 days (3) 0.75 days (4) 0.90 days (5) 8.82 days