The half life ofC when it decays by positron emission is 20.334 minutes. How many positrons, to one significant figure, are emitted each minute when 2.355 grams of C decays by positron emission? The isotopic mass of "C is 11.0114 g/mol.

Q: D. The half-life of 210Pb is 21 years. How old is a painting in which the activity of 210Pb activity…

A: Calculation

Q: How many years after 106Ru is implanted in the eye does it take for its decay rate (or activity) to…

A: Solution  -

Q: On 3 October 1952, the UK conducted the detonation of an atomic bomb in Austrailia, leaving a…

A:

Q: (Q121) Technetium-99 is an unstable isotope used in various medical procedures. Given a half life of…

A: Given: half life (t12)=8.01 hrsmass=1.41 ug To find: Activity in Ci

Q: What is the specific activity (in Ci/g) if 2.6 g of an isotope emits 4.13X10⁶ β⁻ particles per hour?

A: Curie(Ci) -is number of disintegration per second in 1g of radium-226 1Ci=3.70*1010dps

Q: Predict the mode of decay 65Ni undergoes. a. alpha b. beta c. positron d. it is stable/ doesn't…

A: Investigation of decay modes and stability effects on Spectral Statistics of different nuclei…

Q: How many rads does a 69−kg human receive each year from the approximately 10−8 g of 14C naturally…

A: We have given Half Life = t1/2 = 5730 yearsas we know kt1/2 = ln 2k = 0.693t1/2k = 0.6935730 yr…

Q: Phosporous-32 half-life is 14.3 days. A vial containing 10ug of P-32 is accidentally spilled into a…

A:

Q: 31. Uranlum 235 decays to Lead 207 with a half-life of 0.7 billion years. What Is age of a rock…

A:

Q: What is the nuclear binding energy per nucleon of the most stable isotope Iron-56 in terms of…

A: Nuclear binding energy can be defined as the minimum amount of energy required to break down an…

Q: Predict the mode of decay of (a) plutonium-239, (b) indium-12o?

A: Pu-239 undergoes alpha decay and forms U-235. Alpha decay leads to decrease in atomic number by 2…

Q: A radioactive waste contains 2 curies (Ci) of 60CO per liter and 2 mCi of 45 Ca per liter. The waste…

A: Given that:                Amount of C60o per litre is 2 Ci                Amount of C45a per litre…

Q: Would fusing two stable nuclei that have mass numbers in the vicinity of 100 be anenergy-releasing…

A: No. Stable nuclei that have mass numbers around 100 are the most stable nuclei. This should not form…

Q: When the nuclide 214Bi decay, the decay 40. 83 *Po or 210TI, because 81 product is either 214, 81…

A:

Q: Obtain the mass defect (in amu) and binding energy (in MeV) for the 5828Ni nucleus.What is the…

A: Nickel -58 has : 28 protons. 30 neutrons. Mass of one: Proton = 1.007825 amu Neutron = 1.008665…

Q: A rock containing 238U and 206Pb was examined to determine its approximate age. The molar ratio of…

A: Given half-life of U-238, t1/2 = 4.500*109 year  Decay constant, λ = 0.693t1/2 => λ =…

Q: World War II aircraft had instruments with glowing radium-painted dials. The activity of one such…

A: Given , Activity =2.0×105 Bq

Q: (a) What mass of Na₂38SO4 has an activity of 11.7 mCi? Sulfur-38 has an atomic mass of 38.0 and a…

A:

Q: How many MeV are released per nucleus when 3.2X10⁻³mol of chromium-49 releases 8.1X110⁵kJ?

A: 8.11 KJ = 5 ×1016MeV

Q: Randon gas has atomic number 86 and mass number 222. Randon is radioactive and decays via alpha-…

A: Given: Randon gas has atomic number 86 and mass number 222. Randon is radioactive and decays via…

Q: Caesium-137 decays via β - emission with a half-life of 30.17 years. A sample is initially measured…

A:

Q: rbon decays at a rate proportional to the amount present.

A:

Q: An average person is exposed to about 360 millirem of background radiation a year from a variety of…

A: Interpretation- Here 360 millirem of background radiation a year from variety of sources so first -…

Q: days. show solution 1. Write the balanced nuclear reaction of Ni-56 as it undergoes positron…

A: Given, Half life (t1/2) = 6.075 days 1. Balanced nuclear reaction  28Ni56 --‐-> +1e0 + 27CO56 2.…

Q: Draw the decay diagram for the decay of 32 Si to 325. If the total energy of decay for the beta…

A:

Q: 90Sr is one of the most deadly products of nuclear fi ssion. Assume that 4% of the fi ssion fragment…

A:

Q: . The two stable isotopes of carbon are 12C and 13C. Predict the nuclides formed when 11C and 14C…

A: The radioactive decay process involves the disintegeration of an unstable nucleus to furnish new…

Q: Technetium-99 (atomic mass - 98.9 amu) is used  for bone scans. It has a half-life of 6.0 h. What is…

A:

Q: You are working in a facility with a linear accelerator which may be used to measure the level of C…

A: Radioactive decay is a process in which unstable atomic nuclei emit energy in the form of…

Q: Tritium, of hydrogen-3, is prepared by bombarding lithium-6 with neutrons. A 0.250-mg sample of…

A:

Q: When a radioactive isotope 86Ra228  decays in series by the emission of three α-particles and a β…

A: We know that: Decay of one alpha particle reduces the atomic number(Z) by 2 units and mass number…

Q: 28Mg lies above the band of stability- its most likely mode of decay is what?

A:

Q: The radionuclide 84210 Po  decays by alpha emission to a daughter nuclide. The atomic mass of 84210…

A: (a) The radionuclide 210Po decays by alpha emission to a daughter nuclide. The daughter nuclide is…

Q: The radioactive nuclide 2964Cu  decays by beta emission to 3064Zn  or by positron emission to Ni…

A: The nuclide C64u decays to Z64n by beta emission as follows:C2964u→Z3064n+β-10+νThe change in the…

Q: (c ) Iodine-131 has a half-life of 8 days. How many grams of I-131 in a 4.0 g sample remain after…

A: (c) The amount of the isotope that remains after given decay time is calculates by using below…

Q: 226, 88 A radium source contains 50 mg of 238Ra in equilibrium with all its progeny. Assuming 1/2 is…

A: The given radium source contains 50mg of  226 Ra88  in a equilibrium. T12 = 1602 years.

Q: What is the initial activity of a 5 g radioactive source of 60Co given that the specific activity of…

A: Since you have asked a question with multiple subparts, we will answer only first 3 subparts for…

Q: Cesium 137 is a commonly used isotope in the treatment of some cancers, someone you know may have…

A: The reactant given is Cesium 137 i.e 13755Cs.

Q: A rock contains 0.684 mg of 200Pb for every 1.000 mg of 238U present. Assuming that no lead was…

A: Radioactive decay follows first order kinetics.  k = 0.693/t0.5 ....(1)  Here, t0.5 = half-life =…

Q: The radioactive isotope 212Pb has a half-life of 10.64 h. A sample containing this isotope has an…

A:

Q: 9. The noble gas radon has been the focus of much attention because it may be found in homes.…

A: Given: Radon-222 emits alpha particles. Half life = 3.82 days

Q: From Chernobyl, 6e6 Ci of Cs-137 was released in 1986.  Cs-137 has a half-life of 30 years.  The…

A: Here we are required to find the activity of C-137 in the year 2022

Q: A 228-mL sample of an aqueous solution contains 2.35% MgCl2by mass. Exactly half of the magnesium…

A: Given: Volume = 228 mL Mass of MgCl2 = 2.35% Half-life of Mg-28= 21 hours= 21*60*60=75600 s density…

Q: Fluorine-18 is a radioactive isotope use in a variety of medical imaging procedures including…

A: Half-life of 18F isotope = 1.83 hours

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.