The half life of an unstable isotope is 10 years. After what length of time would there be less than 1% of the original atoms of the isotope remaining?
Q: any half-lives pass in a
A:
Q: How many stable isobars do you expect with atomic mass number 57? Number If the nucleus 57FE 26 with…
A: There is only one stable isobar from an atom with mass number 57.
Q: ults vary with the amount of the sample. The decay constant represents a percentage of the sample…
A: Decay constant, proportionality between the size of a population of radioactive atoms and the rate…
Q: 1The half-life of Calcium-47 is 3.91 x 105 seconds. A sample contains 4.11 x 1016 nuclei. How much…
A: Question 1) GivenHalf life of calcium, t1/2=3.91×105 sInitial amount of Nuclie, No=4.11×1016…
Q: A geologist finds an old rock and wants to determine its age using rubidium-strontium dating. This…
A: The age of the rock is 1.36 x 10¹⁰ years
Q: After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. If an…
A:
Q: Radon gas has a half-life of 3.83 days. If 2.86 g of radon gas is present at time t = 0, what mass…
A:
Q: Part A 90 You are examining a sample of rock that contains 1.6x1010 230 Th atoms decay by alpha…
A:
Q: if you started with a parent isotope with 100% of its atoms and its half-life is 10 years. What is…
A: Given. t/T = 2 N(t) = No(1/2)t/T
Q: The nucleus of a particular isotope of beryllium contains 4 protons and 5 neutrons. Which of the…
A: Given in question - The beryllium atom contains 4 protons and 5 neutrons. To find - Which one of…
Q: An investigator has 0.010 μg samples of two isotopes of strontium, 89Sr (t1/2 = 51 days) and 90Sr…
A: Given: The half life of 89Sr is 51 days. The half life of 90Sr is 28 years.
Q: The nucleus (15 8) O has a half-life of 122.2 s; (19 8) O has a half-life of 26.9 s. Assume that at…
A:
Q: The half life of 238 U against a-decay is 92 238 U having 92 1.5 x 10 s. What is the activity of a…
A:
Q: The mass of a helium-4 atom is 4.002603 u. A) determine the mass defect of a helium-4 atom B)…
A: Please see the attached image for the solution. If there are queries or if the image is not loading,…
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: The liquid drop model may be used to determine the nuclear binding energy for an isotope. This model…
A: (a) Binding energy of Fe-56 isotope
Q: The nucleus (15 8) O has a half-life of 122.2 s; (19 8) O has a half-life of 26.9 s. Assume that at…
A: The following data are given:
Q: Element X has three naturally occurring isotopes. The masses (amu) and % abundances of the isotopes…
A: Dear student The average atomic mass of an atom can be found by : Mav = f1m1 + f2m2 + f3m3 Where f…
Q: (A) Binding energy of 22286Ra nucleus = (B) Binding energy per nucleon of 22286Ra nucleus
A:
Q: 75% of a quantity of U-232 remains after 30 years. What is the half-life?
A:
Q: Nucleus A decays into the stable nucleus B with a half-life of 10 s. At t = 0 s there are 1000 A…
A:
Q: The radioactive isotope 31Si has a half-life of 2.62 h. A sample containing this isotope has an…
A: decay constant (d) = 0.693/half life d = 0.693/2.62 hr -1 d = 0.2645 hr-1 d = 0.00007347328 sec-1…
Q: Carbon is one of the fundamental elements in everything that's alive on Earth. The three naturally…
A: Carbon has generally three isotopes found in nature. Isotopes are those which have the same proton…
Q: At the end of its life, a star with a mass of two times the Sun’s mass is expected to collapse,…
A: The expression for the radius is,
Q: The half-life of a radioactive isotope is known to be exactly 1 h. a) What fraction of a sample…
A: Given in question - Half-life (T) = 1 hour Solution: Step1 - Here we will understand the concept…
Q: The isotope palladium-112 undergoes beta decay. Write the reaction equation and determine the…
A: Concept: In beta decay, parent nucleus changes to daughter nucleus and a beta particle (electron)…
Q: nucleus emits an alpha particle with kinetic evergy = 4.20 MeV. What is the daughter nucleus, and…
A:
Q: How much energy in kJ is released to form one mole of 75As from protons, electrons, and neutrons if…
A: The sum of the masses of the nucleons is greater than the mass of the nucleus. This difference in…
Q: A 10 g sample of a radioactive element took 12 days to reduce into 1 g. Calculate the half-life and…
A: Some configurations of protons and neutrons inside a nucleus are unstable. When an atomic nucleus is…
Q: 5. Krypton-85 is an inert radioactive noble gas with a half-life of approximately 10.76 years. a.…
A:
Q: Nucleus A decays to nucleus B, with a half-life of 10 minutes. A pure sample of nucleus A contains…
A: Given:
Step by step
Solved in 4 steps
- in the stable isotope of Potassium 39K there are 19 electrons, 19 protons and 20 neutrons. The mass of the neutral atom is 38.96371 u. Calculate: Total mass / u Mass defect / u Binding energy / J Binding energy / MeV Mass of the proton = 1.007276 u Mass of the neutron = 1.008665 u5. Krypton-85 is an inert radioactive noble gas with a half-life of approximately 10.76 years. a. Write an exponential function to model this situation and define each variable. ( b. Determine what fraction of a sample of Krypton-85 will remain after 86.08 years. State the answer as an exact fraction value. ( C. Determine how long will it take for a sample of Krypton-85 to decay to 1/64 of its original mass. Round your answer to the nearest hundredth of a year.Nuclear Physics - Nuclear Structure Density= Nuclear Structure Z mass Volume radius r=r04¹/3 ro=1.2x10-¹5 m N A = Z+N 4 The radius r of a nucleus is given in the above figure. The volume of a nucleus is V = Proton 56 Fe nucleus has a total of 56 nucleons (protons + neutrons). The average mass of a nucleon is u = 1.66x10^-27 kg I whin ber Neutron A Z If this unknown nucleus has 60 neutrons, how many protons does it have? Enter a number rr³ (a)Calculate the radius of a 56 Fe nucleus. Write the radius in fm, 1 fm = 10-15 m. Keep 2 decimal places. Enter a number x10-¹5m, fm (b) Calculate the Denisity of a 56Fe nucleus.. Write the result in terms of 1017 kg/m³. Keep 2 decimal places. Enter a number x10¹7kg/m³ () (c) An unknown hacieus has twice the volume of 56Fe. What is the mass number A of this nucleus? Enter a number i
- 5. Krypton-85 is an inert radioactive noble gas with a half-life of approximately 10.76 years. a. Write an exponential function to model this situation and define each variable. ( b. Determine what fraction of a sample of Krypton-85 will remain after 86.08 years. State the answer as an exact fraction value. ( C. Determine how long will it take for a sample of Krypton-85 to decay to 1/64 of its original mass. Round your answer to the nearest hundredth of a year.Scientists can determine the age of ancient objects by the method of radiocarbon dating. The bombardment of the upper atmosphere by cosmic rays converts nitrogen to a radioactive isotope of carbon, 14C, with a half-life of about 5730 years. Vegetation absorbs carbon dioxide through the atmosphere and animal life assimilates ¹4C through food chains. When a plant or animal dies, it stops replacing its carbon and the amount of 14C begins to decrease through radioactive decay. Therefore the level of radioactivity must also decay exponentially. A parchment fragment was discovered that had about 75% as much 14C radioactivity as does plant material on earth today. Estimate the age of the parchment. (Round your answer to the nearest whole number.) yr Need Help? Watch It Additional Materials THERA 10 g sample of a radioactive element takes 16.21 mins to reduce into 6 g. Calculate the half-life and identify the element.
- An unlabeled container of radioactive material has an activity of 78 decays/min. Four days later the activity is 63 decays/min. A. Determine the half-life of the material. T = ? days B. How many days after the activity is 78 decays/min will it reach 10 decays/min? t = ? daysIn a real or imaginary nucleus of 45X⁹7, (a) how many protons are in the nucleus, (b) how many neutrons are in the nucleus, and (c) how many electrons are in orbit about the nucleus, assuming the atom is electrically neutral? (a) Number (b) Number i (c) Number Units Units UnitsSolve problem 17 by using equation (2,2) and the k value determined by solving 16.
- The nuclear radius of a fictitious element is 3.145 fm. The number of protons and the number of neutrons in this nucleus are (select all that apply): 09 and 9 O8 and 10 O9 and 8 O8 and 8 9 and 10 O 10 and 8 O8 and 9 O 10 and 9Determine the nucleus density (in kg/m3) of the following four isotopes.4He (m = 4.00260325415 u) = 2.307e17 kg/m^321Ne (m = 20.99384668 u) = ______ (CANNOT BE 2.99328e17 kg/m^3)186Tl (m = 185.97833 u) = ________ (CANNOT BE 2.9946e13 kg/m^3)231Pa (m = 231.035884 u)= _____ (CANNOT BE 3.624e-13 kg/m^3)the decay of a radioactive material has a count rate is 2000 decays/min. 4 hours later, the decay rate is 500 counts/min. what is the half-life?