The body of a stone-age man was found in a glacier in 1997. The body was dated using radiocarbon dating. Recall that t1/2 for 14C is 5840 yrs and R0 = 0.25 Bq for 1 g of 14C in a living organism. Material found within the body had a 14C activity R = 0.133 Bq per gram of carbon. What is the age ( in years) of the body?

Q: The activity of a freshly prepared radioactive sample with a half-life of 4 days is 1000 Bq. How…

A: Given : t1/2 = 4 days No = 1000 Bq N = 250 Bq

Q: You are an archaeologist, and send some leather clothing found at a burial site to be radiocarbon…

A: The general formula for the activity as a function of time t is given by, Here, A, Ao, λ and t…

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A:

Q: You have a 5.2 mol pure sample of an unknown material. After 1.2 h, you discover that 56% has…

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Q: In 1991, German tourists discovered the well-preserved remains of a man, now called “Ötzi the…

A: When scientists date a sample it is essential that the isotope which is used to date the sample…

Q: radioactive

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Q: After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. If an…

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

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A: Given, Specific activity of bone (N)=5.22 disintegrations per minute per gram of carbon (d/min.g).…

Q: An 1 g sample of a radioactive element takes 83.92 million years to reduce into 1 µg. Calculate the…

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Q: 18F is an unstable isotope of fluorine (Z=9) that decays by beta plus emission (β+ decay) with a…

A: The solution can be given as follows :-

Q: A living specimen in equilibrium with the atmosphere contains one atom of 14C (half-life = 5730 yr)…

A: No. of atoms of any sample remaining after a time t is given as: N(t)=N0e-tλ The solution of this…

Q: John is a nuclear worker and has a mass of 70 kg. He was exposed to 10 Ci 137Cs source…

A: A substance with unstable nuclei undergoes radioactive decay. A radioactive substance decays…

Q: The radiocarbon content of 14C decreases after the death of a living system with a half-life of 5730…

A: The formula of the radioactivity is given below where, T is the half life, t is the time, Ro is the…

Q: Problem A You have a 3 mol pure sample of an unknown material. After 3.7 h, you discover that 20%…

A: We can use the equation for radioactive decay: N(t) = N0 e^(-λt) where,N(t) is the amount of…

Q: A student carries out a radioactive decay experiment. She measures the activity of a source as a…

A: Dear student Activity is defined as rate of radioactive decay of nuclei. It is denoted by  R = ¥ N…

Q: A typical person of mass 65 kg contains 0.35% potassium, by weight. Of the potassium, 0.012% is 40K,…

A: Given: The mass of person is m=65 kg. The half life of nucleus is t1/2=1.28×109 y. The activity due…

Q: Gamma rays may be used to kill pathogens in ground beef. One irradiation facility uses a 60Co source…

A: The total amount of energy of gamma rays per beta decay of 60Co can be given as, Here, ε represents…

Q: The half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…

A:

Q: A living specimen in equilibrium with the atmosphere contains one atom of 14C (half-life = 5 730 yr)…

A: Determine the number of carbon molecules per mole. Determine the initial number of atoms of C-14.

Q: What is the half-life in days of a radioactive sample with 4.9x10¹5 atoms and an activity of 6.5×108…

A:

Q: A radioactive sample of 60Co (t₁/2 = 5.271 y) has a ß- activity of 4.4 X 107 Bq. How many grams of…

A: When the number of protons and neutrons inside a nucleus is not balanced some nuclei will become…

Q: Radioactive 214^83 Bi has a half-life of 19.9 min if the activity of the radionuclide 1.2 hours…

A:

Q: What is the half-life in days of a radioactive sample with 3.0x1015 atoms and an activity of 6.2x108…

A: In this problem, we are given the number of atoms in a radioactive sample (N = 3.0x10^15 atoms) and…

Q: After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. If an…

A:

Q: Radioactive substances follow a specific law of decay. Namely, if you have a sample of some…

A: The given problem is based on radioactive decay and half life.  The given equation is 128

Q: Recently unearthed discoveries in North and South American archaeological sites show that charcoal…

A:

Q: The half-life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…

A:

Q: radioactive

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Q: A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 0.8 kg sample…

A: Approach to solving the question: Detailed explanation: Examples: Key references:

Q: A scientist is studying a 2.234 g sample of thorium-229 (t1/2 = 7340 yrs) in a laboratory.    (a)…

A: The mass of the thorium is 2.234 g.The half-life time of the thorium is 7340 years.

Q: A living specimen in equilibrium with the atmosphere contains one atom of 14C (half- life = 5 730…

A: In this question we have to find the age of the given sample in the nearest year. Please give…

Q: An ancient artifact is found to contain 240 g of carbon and has an activity of 479 decays/min. ▬…

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Q: (d) An a particle is confined in a 'Dy nucleus. Assuming the speed of the a particle is…

A: Uncertainty principle states that it is impossible to measure distance and momentum of a particle…

Q: A nucleus of copper has an atomic mass of 64.93 u (with Z=29 and A=65).  Considering that the mass…

A: Total binding energy of the nucleus is 552.89 Mev

Q: A living specimen in equilibrium with the atmosphere contains one atom of ¹4℃ (half-life = 5 730 yr)…

A:

Q: A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 1.19 kg…

A:

Q: Gamma rays may be used to kill pathogens in ground beef. One irradiation facility uses a 60Co source…

A: We know that 1Ci=3.7×1010decay/sec The given activity is =1.0×106Ci. Then the activity on decay/sec…

Q: Potassium-argon dating is used to measure the age of rocks formed from cooled lava by determining…

A: Potassium-argon dating is an interesting way to measure the age of rocks formed from cooled lava. It…

Q: A wood artifact discovered in 1990 showed a 14C-activity equivalent to 43% of that found in the…

A: Given : Half life of C-14, t1/2 = 5730 years Let initial count of C-14 be N = 100 The count of C-14…

Q: The half-life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…

A: Half life T1/2=  yearsInitial activity of the sample A0=6.9 BqActivity of sample At= 1.0 Bq

Nuclear Reactions

Nuclear reactions are processes in which the fundamental characteristics of a nucleus changes. They change into a completely different nucleus. These processes occur naturally in an unstable nucleus. Bombarding an energetic particle can induce nuclear reactions.  In this article, both the naturally occurring nuclear reactions are termed as radioactive decay and the induced nuclear reactions are further categorized as nuclear fission and nuclear fusion.