A sample of an unknown radioactive isotope initially weighs 5.00 g. One year later the mass has decreased to 4.27 g. What is the half life of the isotope?" 4.39 years O 5.39 years O 6.39 years O 7.39 years

A sample of an unknown radioactive isotope initially weighs 5.00 g. One year later the mass has decreased to 4.27 g. What is the half life of the isotope?" 4.39 years O 5.39 years O 6.39 years O 7.39 years

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Related questions

Q: 8. Iodine 131 I is used in diagnostic and therapeutic techniques in the treatment of thyroid…

Q: Determine the half-life (in s) of a radioactive sample that has a decay rate of 5.30 x 1011 Bq when…

A: Given data: Decay rate, dNdt=5.30×1011Bq Nuclei, N = 2.50 ×1015

Q: 9. Iodine 131 I is used in diagnostic and therapeutic techniques in the treatment of thyroid…

A: Given value--- half life time = 8.04 days. We have to find--- What percentage of an initial…

Q: The radioactive isotope (1Os) has a half-life of 22.1 hours. How much of 49.5 g of this isotope will…

A: If initial quantity is N0 and after t time the quantity is N then…

Q: A radioactive material initially is observed to have an activity of 1000 decays per second. If 9.0…

A: Given : A0 = 1000 decays/sec A = 100 decays/sec t = 9 hours

Q: a) Write down the name of important particles and also their symbol, rest mass, energy, charge,…

A: We also hae heavier baryons like hyperons.λ hypernons λ° with mass 1115.68 Mρv/c2 and 1115.68…

Q: The activity of a newly discovered radioactive isotope reduces to 96% of its original value in an…

Q: What is the decay constant of an element with a half-life of 2.73 x 105 years? 7.76 x 10-14 s 7.15 x…

A: Given that:The half life of an element ist1/2=2.73×105 years

Q: The half-life of uranium–238 is 4.5 billion years. What is the decay constant for uranium–238? a.…

A: Given, The half-life of uranium–238 is 4.5 billion years. Half life is time required to decay half…

Q: Determine the half-life (in s) of a radioactive sample that has a decay rate of 4.70 x 1011 Bq when…

A: Given : Decay rate = 4.70 × 1011 Bq Nuclei = 1.70 × 1015

Q: (a) Define the term decay constant of a radioactive substance. 92 (b) The half-life of 238U…

A: We are aware that U92238 a degradation has a half life of 4.5×109 years.We must determine the…

Q: The probability that a randomly chosen nucleus in a radioactive sample will have decayed in a given…

A: Sample of radio active nucleus decayed = 96.875 %

Q: Nt/No vs. t -0.0981'x + 0,847 1.00 0.75 0.50 0.25 0.00 2 ONIN

A: The half-life of a radioactive element is defined as the time at which the initial number of nuclei…

Q: Initially 100 milligrams of a radioactive substance was present. After 6 hours the mass had…

A: Given,Initial mass of the substance, m = 100 mgafter 6 hour mass of the substance decreases by 3%

Q: 5. How many nuclei of 238 U remain in a rock if the activity registers 270 decays per second? (Note…

Q: 40. Balance the following equation: 239- Th 90 239 U 239 94 2381 94 Pu 239 93

A: Given data: N93239p → .....+ e-10 Required: Balance the equation

Q: You have 12 kg of a radioactive substance. Ten years later, you find that you only have 3 kg left.…

Q: Gallium-67 is a radioactive isotope used in treatment of lymphomas. If 63.5% of a 6'Ga sample…

Q: The half-life of radon-222 is about 3.823 days. (a) Determine the decay constant for radon-222. s -1…

A: Given data: The half life of randon-222 is t1/2=3.823 days=330307.2 s Part a: The expression for…

Q: 11. The half-life of Uranium-237 is 5.83 x 105 seconds. What is the decay constant?

Q: The radioactive isotope 209 Po has a half-life of 103 years. How long would it take 84 for only 4.00…

A: Given: The half-life time is 103 years. The remaining sample is 4 g. The total amount of the sample…

Q: 3. Decay of a radioactive material takes place according to the data given in Table 2. Find the…

Q: One half-life of an isotope is 22 years. How many years would it take to have only 25% of the…

Q: Use the following half-life graph to answer the question: What is the mass of the radioactive…

Q: Radioactive decay: A certain substance has a half-life of 5.0 hours. How many nuclei of the…

A: Recall that the activity of a radioactive substance is defined as follows:A=λNWhere:- A is the…

Q: A radioactive sample starts with 800,000 undecayed nuclei. After 12 hours, 700,000 of the nuclei…

A: Given data- initial no of nuclei in the sample (N0) = 800000…

Q: 28. (a) Define the term 'half-life' of a radioactive substance. 92 (b) The half life of 238 U…

A: Here we need to define the half life of a radioactive substance

Q: Which expression correctly describes the radioactive decay of a substance whose half-life is T?

A: Radioactive decay is given by , Nt = N0e-λt And rate constant λ = ln2t1/2 = ln2T

Q: One of the isotopes of chlorine has a binding energy of 298 MeV. Use this information to determine…

A: Binding energy of the chlorine isotope is ∆EB=298 MeV Difference in Mass of the nucleus to that of…

Q: 131 8. Iodine I is used in diagnostic and therapeutic techniques in the treatment of thyroid…

Q: A hazardous material was found to decay at a rate proportional to the amount present. Initially,…

Q: 37 184 H.W: Preparing a pure sample of a radioisotope of argon 1Ar containing 2.5x1016 nuclei. After…

Q: 10.)A radioisotope has a half-life of 5.0 days. The activity of a radioisotope sample prepared ten…

A: half life (t1/2) = 5 days Activity (A) = 6400 Bq time = 10 days

Q: adioactive substance has a half life of 30 minutes. How much of a sample of this substance will not…

A: Given, No = 100%= 1 T= 30min t= 2.5 hours = 150 min We know that, N= No (1/2)t/T

Q: A sample of radioisotope has a decay constant of 9.976x10s1 and prepared with an initial activity of…

Q: The isotope cesium (Cs)-137 has a half-life of 30 years. How long will it take for this isotope to…

Q: Radioactivity You have an isotope with a decay constant of 3.62 * 10-3 s-1. What is the half-life…

Q: 37 H.W: Preparing a pure sample of a radioisotope of argon 1gAr containing 2.5x1016 nuclei. After…

A: Values are given for initial, final nucleii and the time at which the final nuclei found. By using…

Q: Radon-220 has a half-life of 55.6 seconds. What are the odds that any particular Radon-220 atom will…

Q: A hazardous material was found to decay at a rate proportional to the amount present. Initially,…

Q: Platinum-175 decays through alpha decay and forms osmium-171. Estimate the kinetic energy of the…

A: Alpha decay is one of the three main forms of radioactive decay. In alpha decay, the unstable…

Q: Which will be the unknown nucleus formed when 150 s0Nd decays into two a-particles and an unknown…

A: Given : 15060Nd decays into two α particles and an unknown nucleus. To find : Unknown nucleus

Q: B- Measurements on a radioactive sample show that its activity decreases by a factor of five during…

A: Solution-Given thatRatio of final and initial activity AA∘=15Time interval (t)=2 hourNow half life…

Q: When the isotope Bi undergoes beta decay, what isotope is formed?

Q: on gas has a half-life of 3.83 days. If 2.92 g of radon gas is present at time t = 0, what mass of…

Q: 235U is radioactive, with a long half-life of 704 million years. The decay products of a 235U…

A: 235U92 has the half-life of 704 million years. But decay products of 235U92 have half-lives of a few…

Q: A theoretical isotope X-100 has an initial mass of 500g. This isotope has a half-life of 8 hours.…

A: given data initial mass = 500 g half-life is 8 hours determine the mass that will remain after 2…

Q: The half-life of radium-226 is 1.6 x 10 years. How long will it take for 20.0 mg of radium-226 to…

Concept explainers

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.

Question

A sample of an unknown radioactive isotope initially weighs 5.00 g. One
year later the mass has decreased to 4.27 g. What is the half life of the
isotope? *
4.39 years
O 5.39 years
O 6.39 years
O 7.39 years

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

In radio-pharmacy Alpha, Beta-plus, Beta-minus and Gamma decay are all different forms of radio-Active decay. When Uranium-238 (with atomic number 92) emits an Beta-minus particle, the resulting nucleus has atomic number A. 93 B. 90 C. 91 D. 92
6. A radioactive sample has a decay of 0.2193/min. a) What is the half-life? b) If at thestart of an experiment, there are 3.2 x 1015 nuclei present, how much will remain after 1hour?
After 85 years, 80 % of a radioactive material decays. What is the half-life? .298 yr Submit Answer Incorrect. Tries 4/5 Previous Tries
A certain radioactive isotope decays to one sixteenth of its original amount in 4.0 hours. What is its half-life? A. 1.0 hours B. 2.5 hours C. 2.0 hours D. 1.4 hours
6. A certain isotope decays to 10.0% of its original amount in 3 hours. Suppose there are 1.0 x 10¹ atoms of the isotope. What is the initial activity of the material? a) 2.13 x 100 Bq b) 3.24 x 10" Bq c) 4.35 x 10¹⁰0 Bq d) 5.46 x 10 Bq e) none of the above
B1
4:34 LTE classmarker.com The question is based on the following passage. Chemists have determined that elements with atomic numbers greater than 92 are all radioactive. In general, their half-lives are much shorter than the age of the universe. This means that they no longer exist in nature and have all been artificially produced by scientists in nuclear reactions. Elements 93 through 105 in the periodic table have been created and named, and scientists have claimed discovery of elements 106 and 107. The transuranium elements, as they are called, become less stable as the atomic number and mass increase. For example, element number 93, neptunium, has a half-life of two million years, while element number 104, kurchatovium, has a half-life of 70 seconds. The transuranium elements are the heaviest elements that exist and are readily fissionable when subjected to nuclear bombardment. Chemists studying these elements and the periodic table predict that stable elements may be found around…
Identify the isotope notation for the isotope of cadmium that has 54 neutrons
A certain radioisotope has a half-life of 8.96 days. What percentage of an initial sample of this isotope remains after 25 days? Number i Units
The half-life of radon-222 is about 3.823 days. (a) Determine the decay constant for radon-222. 2.1x10-65-¹ ✓ (b) What percentage of a sample remains undecayed after two weeks (1.21 x 106 s)? %
1.) Radioactive 1125 is used to treat a certain cancer. Its half-life is 59 days, and the initial activity is 0.60 mci. The isotope decays by electron capture. What is the daughter isotope? How many grams of the isotope are initially present?
33.)Cobalt-60 is usually used as a radiation source in the practice of medicine. This isotope of cobalt has a half-life of 5.25 years. How long will it take for its activity to decrease to about one-eighth its original amount? 10.5 years 15.8 years 2.63 years 5.25 years