Choose the BEST answer to the following. When an element ejects an alpha particle, the mass number of the resulting element (a) reduces by 2. (b) reduces by 4. (c) increases by 2. (d) increases by 4.

Q: What is the ratio of the radius of an element with mass number 50 to that of an alpha particle

A: Answer              2.321

Q: How does the mass number of an element change when it undergoes alpha decay? decrease by 2 decrease…

A: In Alpha decay of an radioactive nucleus , the mass and charge of the daughter nucleus decreases by…

Q: Why does a neutron make a better nuclear bullet than a proton?

A: A neutron has no charge, so it will not be repelled or absorbed between neutrons and the nucleus.

Q: What is alpha decay?

A:

Q: Suppose that the energy released by the splitting the nucleus of a single atom of a particular…

A: Given that:E=2.78×10-11 Jm=3.93×10-25 kgM=1 gm=10-3 kgMa=100000 Mt=100000×1000=108 kg

Q: Consider the nuclei Sn with an atomic number of 50 and mass number is 118 . Determine its mass…

A:

Q: hat atomic number, mass number, and element results when a Radon-222 atom emits a gamma ray through…

A: As we know that the atomic number of Radon is 86 and mass number is 222.

Q: If the half-life of Uranium 235 is 700 million years, what would its third-life be?

A: Given data: The half life of Uranium 235 is t1/2=700 million years.   The expression for the…

Q: In which of the following is it possible for an entirely new atom to form. (Mark all that apply)…

A: Given problem is based on the Nuclear Physics concept. We have asked, in which process entirely new…

Q: The half-life of radio-active isotopes is 140 days. How many days would it take for the activity of…

A: Given data: the half life of radio-active isotope, t1/2 = 140 days

Q: Which of the following is/are true about Alpha particles? Mark all that apply. They have a higher…

A: We know that alpha particle is doubly charged helium ion having mass equal to 4u. Alpha particle…

Q: sample of radioactive material starts with 0 grams. After 3 half lives have passed, how much…

A: Half-life is the amount of time it takes for one half of a sample of a radioactive isotope to decay.…

Q: If 3.92 half-lives have occurred, what amount of radio-active material would be left if you began…

A: The radioactivity formula is  N = No12n where, No is the initial amount, n is the number of half…

Q: how many beta particles are released when 197 82 transmutes to 197 79 Au

A: Reaction: Au19782→Au79197+3e-+3ve

Q: If Nitrogen-14 absorbs a neutron and then emits a Hydrogen-1, what nuclues is formed?

A: The given atom is a nitrogen-14 atom.   The reaction of a Nitrogen-14 with a neutron can be…

Q: If you start out with 20 grams of a radioactive material, and 4 hours later you have 5 grams of that…

A: Given data:  Initial amount of material (N0) = 20 g Time (t) = 4 hours Remaining amount of material…

Q: If he sample of radioactive isotope has a half-life of one decade how much of the original sample…

A: Second decade means radioactive isotope will complete two half-life. So the amount of original…

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

A: a) Calculate the decay constant. N(t)=Noe-λt λ=1tlnNoN Substitute the values. λ=1365 daysln200 g7.1…

Q: How is Nuclear fission reaction different from Nuclear fusion?

A: Nuclear fission is splitting of the single nucleus into more than one nucleus.   Nuclear fusion is…

Q: A beta particle is A.a form of highly penetrating radiation . B.an electron emitted by a larger…

A: The transformation of a neutron into a proton and an electron (followed by the emission of the…

Q: A certain radioactive element has a half life of 3 hours.  How many hours would pass during 4…

A: Half life for a radioactive material is the time taken by the material to radiate to it's half…

Q: Three quarters of nuclie in a given radioactive sample decays in 2 weeks. What is the half life of…

A: we have to find half life of the sample, in the given question.

Q: Complete the radioactive decay chain below. The arrows indicate the type of decay process. Vertical…

A: We need to complete the table shown in the question. Vertical arrows show alpha decay while diagonal…

Q: Thirty percent of a radioactive substance decays in two years. By what percent does the substance…

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Q: (4-14)Calculate the mass of 1.0 Ci and 1.0 Bq of 214Pb from its half-life of 26.8 min.

A: "As per the guidelines i solved the first question alone". (4-14) The activity of lead Pb is,…

Q: Choose the BEST answer to the following. A certain element emits 1 alpha particle, and its products…

A: An alpha decay of 2He4 changes both the atomic mass and atomic number of the resulting element…

Q: The disintegration constant of Ra-226 is 4.3 × 10–4 disintegration per year. Calculate the number of…

A: Given values: Disintegration constant, λ=4.3×10-4 disintegration/year Activity, A=3 kBq

Q: If the parent isotope starts with 100 grams, but your samples yield only 12.5 grams of the parent…

A: Given Data Initial mass of sample is M= 100 g Final mass is m = 12.5 g

Q: How many beta particles are released when 19782 Pb transmutes to 197 79 Au? a. 3 c. 10 b. 4 d. 12

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Q: Suppose that you are given a 200 gram sample of a radioactive substance with a half-life of 45 days.…

A:

Q: Some people say that all things are possible. Is it at all possible for a common hydrogen nucleus to…

A: Hydrogen nucleus has only a single proton. An alpha particle is a helium nucleus and hence has two…

Q: Why is uranium-235 used in nuclear fission? why is uranium-235 one of the only elements ideal for…

A:

Q: At 6:00 AM a hospital uses its cyclotron to make 1 milligram of the isotope fluorine-18 for use as a…

A: The initial value of isotope fluorine -18  is N0 = 1 mg. The half-life of F-18 is 1.8 hr. F-18 left…

Q: Astatine-220 releases an alpha particle. What element results, and what is its mass number?

A: Parent nuclei = Astatine - 220 Atomic number = 85 atomic mass = 220 u Products after decay Alpha…

Q: Which produces more energy, the fissioning of a single uranium nucleus or the fusing of a pair of…

A: The energy released by the fusion of one uranium molecule is greater than the energy released by the…

Q: The half-life of Cs-137 is about 9.46*10^8 seconds. The decay constant (λ) is 7.33*10^-10 s^-1.  If…

A: Given that: T1/2=9.46×108 sλ=7.33×10-10 s-1At t=0, dNdtr=1000To determine the decay rate…

Q: 33.)Cobalt-60 is usually used as a radiation source in the practice of medicine. This isotope of…

A: Half life is the time in which the cobalt activity will be reduced to 1/2 of its initial value .

Q: What is given off by gamma decay?

A: In a gamma decay, unstable nuclei undergo decay to emit excess energy in the form of gamma rays.

Q: What is activity or rate of decay? Give its SI unit.

A: Generally the activity R which is the rate of decay is expressed in decays per unit of time.

Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.