How many neutrons are in uranium-235?

Q: A laboratory that uses radioactive substances received a shipment of 122 g of bismuth-210. Only 6.64…

A: Write a given value of this question. A0=122gA=6.64gt=21day Half life equation. A=A∘12th

Q: The half-life of strontium-90 is 28 years. How long will it take a 50-mg sample to decay to a mass…

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Q: What is the mass number of an alpha particle?

A: Mass number is the total number of nucleons. It is the sum of number of protons and neutrons.

Q: A radioactive sample has a half-life of 10 minutes. What fraction of the sample is left after 40…

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Q: A 30 g radioactive isotope has a half-life of 6 years. How much of the isotope will be left after 12…

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Q: An element loses 22% of its mass every year, what is the half life?

A: Let the original mass of element be No and it loses 22% of mass its mass in a t=365 days i.e.,…

Q: Q6: 100 g of radioactive element X are placed in a sealed box. The half-life of this isotope of X is…

A: Disclaimer: Since you have posted two questions and no specific question number is mentioned, we…

Q: When a nucleus of emits an alpha particle, what are the atomic number and the atomic mass of the…

A: In alpha decay, an unstable nucleus will emit an alpha particle, which is a helium nucleus composed…

Q: How many alpha particles are emitted per second from 1 microgram of radium?

A: we know that,  1C= Activity of 1 g of Radium=3.7×1010 days

Q: if a record sample has rate of 44100Hz, how many samples are required to capture 0.25s?

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Q: A radioactive material decays at a rate proportional to its amount . If the material has a half-life…

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Q: A certain chemical reaction requires of 4.82 X104 Jenergy input for it to go. What is the increase…

A: Energy, E = 4.82 X104 J

Q: A radioactive substance is found to register 5000 counts per second on a Geiger counter.…

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Q: The half-life of a particular element is 330 days. What is its decay constant?

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Q: When gamma is 1.88, what is beta

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Q: The isotope cesium-137 has a half-life of 29.75 years. How long will it take a 100 gram sample of…

A: Given data The half-life of the cesium-137 is t1/2 = 29.75 years. The initial amount of the…

Q: A pound of coffee beans yields 50 cups of coffee (4cups = 1qt). How many mililiters of coffee can be…

A: Given: The number of cups are n=50 cups. The quantity is 4 cups =1 qt. The mass of coffee bean is…

Q: Iodine-131 has a half-life of 8 hours. If a solution containing 5 grams of iodine-131 is injected…

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Q: Polonium-215 has a half-life of 0.0018 seconds. What is its mean lifetime?

A: Half-life of polonium is 0.0018 seconds,

Q: If you dispense 0.3 grams of aspirin, how many milligrams are you giving?

A: CONCEPT: Method of conversion of unit is used to find required value. 1 g=1000 mg where g is gram…

Q: If you purchased 3.61 Mu Ci of sulfur-35, how many disintegrations per second does the sample…

A: Given: Initial amount of sulfur-35 = 3.61 x 10-6 Curieand 1 Curie = 3.7 x 1010 Bq1 Bq = 1 decay/s

Q: A radioactive substance plutonium-239 has a half-life of 24,000 years. Initially, there is 700 mg of…

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Q: What is the half-life of a radioactive isotope if the activity of a sample drops from 14,080 cpm to…

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Q: A beam of gamma rays passes through 4x10-3 kg of air and produces 1.7x1012 ions. What is the…

A: we have  mass M=4 x 10-3kg charge=1.7x1012x1.6x 10-19C=2.72x10-7C

Q: The nuclear waste produced by a nuclear reactor consists mostly of fission fragments and plutonium…

A: Given The nuclear waste produced by a nuclear reactor consists mostly of fission fragments and…

Q: How many atoms of carbon-14 are there in Ig of carbon-12 in living organism?

A: Since there are 6.022×1023 carbon atoms in 12 grams of carbon. The 12 gram carbon atom contains,…

Q: an atomic bomb explodes with 4.5 x 1018 Joules released.  how much nuclear fuel (in kg) is burnt in…

A: Given data The energy released during the explosion is E = 4.5 x 1018 J.   According to the…

Q: One in 6500 water molecules contains a deuterium atom. If all the deuterium could be extracted from…

A: The total number of water molecule in 1 cubic meter is, Now the number of D-D fusion reaction is,

Q: The Neutron number N is the number of neutrons in the.

A: The neutron number is the number of the neutrons in the Nuclide or Nucleus.

Q: When the plutonium bomb was tested in New Mexico in 1945, approximately 1 gram of matter was…

A: According to Einstein principle Energy equals mass times the speed of light squared. E = mc2    =…

Q: What is the mass number of germanium?

A: Mass number : The total number of protons and neutrons  present in the nucleus is called the mass…

Q: If the half life of an element is 32.2 years, how many years it take for a sample to decay to the…

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Q: Carbon 14, with a half-life of 5700 years, is used to estimate the age of organic materials. What…

A: The expression for the half-life of carbon-14 is written as, Here, λ represents the decay constant…

Q: A radioactive nuclide has a half-life of 10 seconds. Beginning with 256 grams of the material, how…

A: Given: Half life period t1/2 = 10 sec Initial concentration N0 = 256 g Time = 1 min = 60 sec = 6…

Q: A radioactive substance disintegrates 1/64 of initial value in 60 s. The half-life of this substance…

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Q: How many radioactive nuclides are in a sample with a radioactivity of 3.1 kCi? The half-life of the…

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Q: A substance decays according to the formula Q = 24(0.5)"2.4, where t is in weeks. (a) What is its…

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Q: How much radiation is a person working in a nuclear-related occupation allowed to be exposed to in a…

A: The radiation from the nuclear related occupation is very hazardous for health as well as nature.

Q: A silver coin has a mass of 17.75 g. If the atomic mass of silver is 107.868 u, how many silver…

A: mass = 17.75 g Atomic mass of silver = 107.868 u Number of moles of silver present in the coin =…

Q: The efficiency of a nuclear power plant is 36.1.0 %. If 280.16.0 kW of power are produced by the…

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Q: A neutral argon atom has how many neutrons?

A: Given data:  Neutral argon Atomic number (Z) = 18 Mass number (A) = 39.948 ≈ 40 Required: Number of…

Q: A radioactive element has a half-life of 33 years. What is its continuous rate of decay?

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Q: The half-life of the radioactive isotope cesium-137 is 30.17 years. How long (in years) does it take…

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