The half-life of radium is about 1600 years and its atomic number is 226. Find  the percentage of undecayed atoms left after 100 years and the activity of 1 mg of radium (assume one disintegration/atom)

Q: ny radioactive dating method is used, experimental error in the measurement of the sample's activity…

A:

Q: A particular radioactive material was weighed exactly 1 year ago, showing a mass of 200 g. If the…

A: Given: Mo=200 gM=23.0 gt=1 year = 365 days

Q: Suppose that you start with 3.65 g of a pure radioactive substance and determine 19.6 h later that…

A:

Q: A radioactive series consists of two different radioactive materials. One radioactive material with…

A: Given that: Decay constant of parent nucleus = k1  Decay constant of daughter nucleus = k2  y1(0)=a…

Q: Material found with the body had a C-14 activity of about 0.215 Bq per gram of carbon, where the A0…

A: The half life is t1/2=5730 yrs

Q: A radioactive sample has an initial activity of 6.55 x 10°Bq (1Bq is one disintegration per second).…

A: Given, initial activity N0 = 6.55 x 109 Bq After t=4 hours, activity N = 1.02 x 108 Bq Half life…

Q: Tritium has a half-life of 12.3 years. Suppose there are initially 1.0 x 1012 tritium atoms. (a)…

A:

Q: If a radioactive substance has an initial activity of 0.67 Ci and a half-life of 3.0 days, what is…

A:

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A:

Q: Suppose the activity due to the radioactive decay of the carbon-14in a tiny sample of an artifact…

A: The activity of fresh wood sample is The activity of old wood sample is The half life of carbon 14…

Q: An 10 g sample of a radioactive element takes 5432.6 years to reduce into 1 g. Calculate the…

A: Radioactive decay takes place when an unstable nucleus becomes stable. The instability arises due to…

Q: Consider a pure 4.0g sample of radioactive gallium-67. If the half-life is 78 h, how much time is…

A:

Q: Suppose Radon gas is trapped in a basement after renovations. The half life of radon gas Is 3.8235…

A:

Q: Tritium has a half-life of 12.5 y against beta decay. Determine fraction of a sample which will…

A: (1) We have given Th=12.5 years Here Th= half life We know that NNo=12tTh NNo=122512.5=122=14 N=No/4…

Q: For Radium-226 ( atomic mass = 226.0254 u) determine (a) the mass defect, (b) the binding energy in…

A: The objective of this question is to calculate the mass defect, binding energy in MeV, and the…

Q: For the radioactive isotope strontium-90, k is 2.47 x 10-2 years -1. If the original amount of…

A:

Q: If 16 g of radon with a half-life of 4 days is present in a balloon at t = 0, what is the mass of…

A: Most of the nuclei present are unstable in nature. They try to gain stability by disintegrating…

Q: A sealed box containing alloys of metal A and Metal B consisting of the same parts accordingly.…

A: half life of A = 12 years half life of B = 18 years mass of A = 0.53 kg mass of B = 2.20 kg A =…

Q: The half-life of iodine-131 is 8 days. How long does it take for the initial activity of 4500 kBq /…

A: half life of iodine 131 = 8 days Initial activity (Ao) = 4500 kBqm3Final activity (A) = 65 kBqm3

Q: At present, concentration of  92235U  in naturally occurring uranium deposits is approximately 0.7…

A: Concentration after 1.7 billion year is = 0.13%

Q: The half-life of radium is about 1600 years and its atomic number is 226. Calculate (i)  the…

A: i. 95.76 %ii. 1.102*10^(15) disintegrations/yearExplanation:Step 1: For part (i), calculate the…

Q: Question 84 ."Radium being a member of the uranium series occurs in uranium ores. If the half lives…

A: Solution:-Given thatHalf life of uranium (t12)=4.5×109 yearsHalf life of radium (t'12)=1620 years