What is the % of parent atoms in a rock after three half-lives?

Question

Question

Answer 1

Answer #1

Ans- 12.5% parent will remain after 3rd half-life

Originally the parent will be 100% and daughter 0%.

After 1st half-life parent and daughter both becomes 50%.

After 2nd half-life parent becomes 25% and daughter 75%.

After 3rd half-life parent becomes 12.5% and daughter 87.5%.

Answer 2

Similar Homework Help Questions

A) According to the data, what are the approximate half-lives of the hypothetical elements A, B,...

A) According to the data, what are the approximate half-lives of the hypothetical elements A, B, C, and D? B) Which of the hypothetical substances would be the most harmful to living organisms? Why? C) What part of an original isotope's number of atoms remains after two half-lives? D) After three half-lives of an isotope, 1 billion (one-eighth) of the original isotope's atoms still remain in a certain amount of this element. How many atoms of the daughter product would...
after three half lives of sn isotope , 1 billion of the original isotopes Adams still...

after three half lives of sn isotope , 1 billion of the original isotopes Adams still remain in a certain amount of this element how many atoms of the daughter product would you expect to be present
What fraction of undecayed radium atoms would remain after two half-lives? A. 1/16 B. 1/4 C....

What fraction of undecayed radium atoms would remain after two half-lives? A. 1/16 B. 1/4 C. 1/8 D. 0

235U decays to 207Pb. 1. Which is the parent, U or Pb? 2. If 3 half...

235U decays to 207Pb. 1. Which is the parent, U or Pb? 2. If 3 half lives have passed, what is the parent daughter ratio? a) 50/50 b) 25/75 c) 12.5/87.5 d) 6.25/93.75 e) 3.125/96.875 3. The half life for 235U decay to 207Pb is 704 Ma. How old is the rock in the previous question? The half-life of 40K is 1.3 billion years. 4. If a 3.9 billion year old rock contains 100g of 40K, how many grams of...
Student Name Lab Section Date Rock type Number of parent atoms Basalt Number of daughter atoms...

Student Name Lab Section Date Rock type Number of parent atoms Basalt Number of daughter atoms 7497 071 Granite 11480 3827 Gneiss 839 2517 HORSION TABLE 5.3 6. What is the radiometric age of the basalt? Show your calculalions. 7. What is its relative age? Use the Geologic Time Scale. the r ometric age of the granite? hat 9. What is its relative age? Use the Geologic Time Scale. wth tithe 10. What is the radiometric age of the gneiss?...
If a radionuclide has a half-life of 10 years, how many parent nuclide atoms will be...

If a radionuclide has a half-life of 10 years, how many parent nuclide atoms will be left after 10 years since the start of the decay? How many daughter nuclides will exist at that time? Assume daughter nuclides are stable. Please show explanation, Thank You

16. What will he the level of activity (in terms of X) after two half lives...

16. What will he the level of activity (in terms of X) after two half lives have elapsed? 17. What would the activity of a the above sample be if we tripled its size? 18. If the initial activity of 0.365 grams of the above sample is Y Bq, what would the activity be if we increased the initial sample to 0.950 grams? The decay curve of a radioactive nuclide 1000 sample is shown. Its initial activity is measured to...
a rock is going to be analyzed for its radioactive isotope contents, x and y. X...

a rock is going to be analyzed for its radioactive isotope contents, x and y. X is the parent and Y is the daughter isotope. Assume that the half-life of the radioactive isotopes is 5,730 years. Based on this information, answer the following two questions How much of the parent X and how much of the daughter Y will be present after two half-lives?
After 2 half-lives have passed, what % of the original radioactive isotope remains?

After 2 half-lives have passed, what % of the original radioactive isotope remains?

Part A How many half-lives must elapse until 88 % of a radioactive sample of atoms...

Part A How many half-lives must elapse until 88 % of a radioactive sample of atoms has decayed? Express your answer using two significant figures 10 AED – O @ ? Submit Request Answer Part B How many half-lives must elapse until 97 % of a radioactive sample of atoms has decayed? Express your answer using two significant figures. IVO AXP = 0e? 1/2 Submit Request Answer Provide Feedback