A 739.7 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to 92.46 ng. How many half‑lives of the unknown radioactive substance have occurred?

Q: Ra-226 undergoes alpha decay and produced -4.8x10 kJ/mol of energy in the process. Determine the…

A:

Q: Do you think that nuclear fusion will be possible?

A: Yes nuclear fusion is possible. the reaction in which small nuclie combine to form a bigger nucleus…

Q: Uranium-235 decays to Lead-207 with a half life of about 704 million. years. if you find a 1000g…

A: Half life of Uranium-235t12 = 704 million years Initial amount of fossilNo= 1000 gms Final amount of…

Q: b. Type of radiation: Explanation: Proton Neutron 137 56 Ba 137 56 1Ba

A: Given: 137 Ba56 ---------> 137 Ba56

Q: Complete the following nuclear bombardment equation by filling in the nuclear symbol for the missing…

A:

Q: A freshly purified 2.00 g sample of the alpha particle emitting radionuclide 244 Am is prepared then…

A: Mass of radionuclide = 2.00 gVolume of evacuated container = 0.100 LTemperature = 25 °CPressure =…

Q: Identify products in the decay series for uranium-235 given the radiation emitted.

A: The decay series for uranium-235 has to be given.

Q: A sample of a material has 200 radioactive particles in it today. Your great-grandfather measured…

A: In this problem half life period is 90 years because the radioactive particle reduced to half from…

Q: The isotope of iodine with mass number 128 undergoes beta decay with a half-life of 25.00 minutes.…

A: As the iodine undergo radioactive decay , it obey first order reaction . By using the half life…

Q: Krypton-85 has a half life of 10 years. Approximately what percentage of Kr-85 produced from the…

A:

Q: Which of the following statements must be TRUE regarding nuclear fusion? O A The mass of the…

A: Nuclear fission: In a nuclear fission reaction, the nucleus of an atom splits into two or more…

Q: The radioactive nuclide has a shelf-life of 17.5 hours. What mass remains from 0.0100g sample after…

A: Shelf-life of 17.5 hours, Calculate the mass remains from 0.0100 g after 24 hours.

Q: The ionization and damage created by alpha rays is more concentrated and harder for the organism to…

A: Ionizing radiation is the most harmful because it can ionize molecules or break chemical bonds,…

Q: 2. The half-life of radon-222 is 3.8 days. How much of a 100 gram sample is left after 15.2 days?

A: Given data contains, The half-life of radon-222 is 3.8 days. Mass of sample left after 15.2 days is…

Q: What are the major differences between alpha particlesand gamma radiation?

A: Nuclear reactions involve the emission of different kinds of radiations from the heavy radioactive…

Q: All the nuclides below undergo nuclei decay, write an equation for each process with an explanation.…

A: For nuclear reactions : The sum of the mass numbers of the reactants equals the sum of the mass…

Q: Complete the following nuclear equation: 23U+¹4N? + 6n

A: Complete the following nuclear reaction--

Q: Plutonium (Pu) is an artificial element made by bombarding a uranium-238 nucleus with an alpha…

A:

Q: Certain radioactive isotope has a half-life of 3.9 minutes. If we initially have 7168 grams of this…

A: According to the question, we have: Half life of radioactive isotope = 3.9 minutes.  Initial mass =…

Q: The sample of a radioactive element with a half-life of 2 minutes has an initial mass of 800 g. Plot…

A: The objective of the question is to understand the disintegration of a radioactive element with a…

Q: When a radioactive isotope undergoes decay, what happens to it? Is it still the same type of atom?

A:

Q: Which of the various particles (α particles, β particles, and so on) that may be produced in a…

A: Nuclei consists of neutrons and protons except protium.

Q: A radioactive isotope has a half life of 83.3 minutes. How long will it take for the radiation from…

A:

Q: A rock contains a Pb-206 to U- 238 mass ratio of 0.262: 1.00. Assuming that the rock did not contain…

A: The answer to the following question is-

Q: The products of a nuclear reaction usually have a different mass than the reactants. Why?

A: In nuclear reactions, one or more nuclei collide to form one or more nuclide that are different from…

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 4.2 g remain. What is the original…

A:

Q: A 26.00-g sample of water containing tritium, 3 1H, emits 1.50 * 103 beta particles per second.…

A: In radioactive decay, radioactive atom's nuclei (unstable) eject energy as well as charged particles…

Q: If there were 300 grams of carbon-14 originally present, how many years would it take for there to…

A: Interpretation -  To determine how many years would it take for there to be 90 grams of carbon-14…

Q: B,B, a a emissions to produce uranium-236? What nucleus decays by successive

A:

Q: Write the particle that is emitted in the following nuclear processes: Gold-198 decays to mercury…

A: Nuclear reaction is a process in which a nucleus of an atoms produces a new nucleus of atom . To…

Q: An 80.0 g sample of iodine-131 was placed in a sealed vessel forty days ago. Only 2.5 g of this…

A: Decay reactions are first order reactions. Since we know that the relationship between the amount of…

Q: The daughters of alpha decay always have two fewer protons and two fewer neutrons than the parent.…

A: Alpha particle is helium nucleus.i.e., 4He2 . The number of protons here is 2 and the number of…