What is half-life? y decaying to the half of the number. If we start with 400 atoms of a radioactive substance, how many would we have after: one half-life? c. three half-lives? a. b. two half-lives? d. four half-lives? If we start with 48 atoms of a radioactive substance, how many would remain after: one half-life? c. after three half-lives? a. b. two half-lives? d. after four half-lives?

What is half-life? y decaying to the half of the number. If we start with 400 atoms of a radioactive substance, how many would we have after: one half-life? c. three half-lives? a. b. two half-lives? d. four half-lives? If we start with 48 atoms of a radioactive substance, how many would remain after: one half-life? c. after three half-lives? a. b. two half-lives? d. after four half-lives?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

4. The half-life of bismuth-212 is 1 hour. If 12g of bismuth are allowed to decay, what mass of bismuth 212 is left after 3 hours? A) 26.5g B) 53g C) 3g D) 19
12. Alpha decay is generally represented by the symbol on the product side of the equation. A. °oY B. °1B C. °He D. 42HE
Assuming two samples of radioisotopes both contain the same number of atoms, the activity of the shorter-half-life isotope would be initially _____ and decay _____. a. higher; more slowly b. lower; more quickly c. lower; more slowly d. higher; more quickly e. the same; more slowly
Please answer 5 and6. Thank you
27. Which statement is true about the half-life of a radioactive nucleous _____. a. constant for the givin nucleous. b. gets shorter with passing time. c. gets longer with passing time. d. gets shorter with increased temperature e. get longer with increased temperature
None
Cobalt-60 is a beta emitter with a half life of 5.3 years. Approximately what fraction of cobalt-60 atoms will remain in a particular sample after 26.5 years? a. 1/5 b. 1/16 c. 1/26 d. 1/32 e. 1/64
The accompanying figure illustrates that after two half-lives, ____ percent of the parent radioisotope has decayed. 50 0 75 25 100
8. Thoron has a high average annual radiation dose according to the graph. It is a heavy radioisotope formed from the decay of thorium emitting an alpha particle. Thoron has a half-life of less than a minute. Would thoron be good to use in the medical field? Why or why not? Continue to the next slide ... ASUS % & 5 6 7 8. 9 ty i
A specimen of charcoal found contains 57% as much 14C as a sample of present day charcoal. What is the age of the sample? (14C has a known half-life of about 5700 years.) A. 4622.51 yrs B. 6940.27 yrs C. 5147.88 yrs D. 7490.48 yrs
If the half-life of compound FUSHA is 131 years, assuming that a 500g sample of meteorite containing compound FUSHA is 40% decayed. How old is the meteorite? a. 137 yrs b. 173 yrs c. 371 yrs d. 317 yrs
A 25-g sample of a pure radioisotope decayed until approximately 1 gram remains. If it took 245 days for this to happen, the half-life of the radioisotope is closest to __________. Select one: a. 53 days b. 78 days c. 152 days d. 20 days