Potassium is a useful element in the human body and is present at a level of about 0.3% of body weight. Calculate the 4019K activity in a 60-kg person. (40K has 0.012% natural abundance.)

Q: Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to…

A: Given: The half life time of thorium is t1/2=1.405×1010 y. The mass of thorium in lantern is m=300…

Q: What is the activity of a 20 ng sample of 92Kr, which has a half-life of 1.84 s?

A: In 92gm of 92Kr, will contain 6.02×1023 atoms of 92Kr.

Q: 4.605 5. The time for 99% of a sample of a radioisotope to decay is given by the equation to.99 k…

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Q: If the parent nucleus in a ß* decay is CI, what is the daughter nucleus? 17 Help chemPad XX Greek:…

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Q: Two fusion reactions mentioned in the text aren + 3He → 4 He + γandn + 1H → 2H + γ .Both reactions…

A: The mass of the particles participating in the provided nuclear reaction is:

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

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Q: The photoelectric work function of potassium is 2 eV. What potential difference would be applied…

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Q: The radioactive isotope 241Am, with a half-life of 432years, is the active element in many smoke…

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Q: Mantles for gas lanterns are made of thorium, because it forms an oxide that can survive being made…

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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: 14. Lead has four isotopes, with the following atomic masses and relative abundances: 203.973 amu…

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Q: Help.answer.explain A nucleus of Th-231 undergoes beta decay. Write the equation that explains this.

A: A nucleus of Th-231 undergoes beta decay. To write the equation of beta decay.

Q: 4. Show that that a higher substrate temperature leads to an increase in the size of the critical…

A: Using the capillary theory of heterogeneous Nucleation, free energy charge involve formation of an…

Q: A certain amount of a sample of 96X has an activity of 0.1084 μCi. In 24.2 days, the activity of the…

A: Given, A certain amount of a sample of 96X has an activity of 0.1084 μCi. In 24.2 days, the activity…

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: Consider the 1² N nucleus. Find approximate values for its (a) radius, (b) volume, and (c) density.…

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Q: A 5000-Ci ⁶⁰Co source used for cancer therapy is considered too weak to be useful when its activity…

A: Basic Details The ratio of the activity is an exponential function of decay activity and the time…

Q: Calculate the activity due to 14C in 1.00 kg of carbon found in a living organism. Express the…

A: The formula of activity is,

Q: 4. a) Co" has a half-life of 5.2 years. i. Calculate the disintegration constant? ii. Calculate the…

A: Note : Out of given various questions, we solve only first question. You can resend the question for…

Q: Ex6/ Barium 137 has a half-life of 156 seconds. An initial activity of 2000 disintegrations during a…

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Q: Please don't provide  handwritten solution...

A: The half-life of the isotope is given in hours and minutes. We need to convert this into seconds for…

Q: Co decays with a half-life of 5.27 years to produce 8 Ni. 60 (a) What is the decay constant for the…

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Q: P239u is a nuclear waste byproduct with a half-life of 24,000 y. What fraction of P239u present…

A: The formula for remaining nuclei in terms of half life  N=N012tt1/2

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: Consider the nuclei  11750Sn. Determine its mass defect in kilograms if its atomic mass is 116.95…

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Q: Explain why 231-Th-90 is likely to be a beta minus emitter

A: Why 231-Th-90 is likely to be a beta minus emitter.

Q: 5x10°ci of Sr( Ty2=27.7y8) in to air. The 10Sr falls out dver an area 900 04 Km? How Long will it…

A: Given: The half life is 27.7 yr.            The area is 104 km2.           The final activity is 2…

Q: What is the activity of a 398.8-g lump of carbon that is 2.79 x 10" years old? Give your answers in…

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Q: Cadmium-107 has a half life of 6.52 hours. If you start off with sample which has an activity of 1.0…

A: The reactivity of the sample after time t is given by:

Q: A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 0.92-kg…

A: The initial activity of the sample can be obtained as R0=0.92×103 g15.0 decays/min11g=1.38×104/min

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 wooden object found in an indian burial groud and subjected to radiocarbon dating. The decay rate…

A: Given: The final disintegrations N = 10 disintegrations per minute per gram carbon.

Q: A particular rock is thought to be 260 million years old. If it contains 3.70 mg of 238U, how much…

A: The initial amount of substance is,

Q: (a) A wooden artifact is found in an ancient tomb. Its carbon-14 ( 14 c) activity is measured to be…

A: Known quantities:-  Half life of carbon-14 (T1/2)= 5730 years Age of artifact is given by formula…

Q: an element with initial mass 1 kg started radioactivity in 2021 , in which year the element will…

A: The mass is proportional to the radiation concentration. Which means that the radiation equation can…

Q: A certain isotope has a half-life of 5.9 h and an atomic mass of 95.98 u. What will the activity in…

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