This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: If the amount of radioactive element is 1/8 of the amount originally present, how many half-lives ... (Read 233 times)

Frost2351

  • Hero Member
  • *****
  • Posts: 557
on: Jul 16, 2018
If the amount of radioactive element is 1/8 of the amount originally present, how many half-lives have gone by? Please show your work.
 
  What will be an ideal response?

Question 2

Which is younger  rock unit X or B?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

cam1229

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jul 16, 2018
Answer to Question 1

P=Parent, D = Daughter, HL = Half-lives

P D HL
1 0 0
1/2 1/2 1
1/4 3/4 2
1/8 7/8 3
The answer is 3 half-lives have gone by.

Answer to Question 2

B is younger, otherwise it could not include pieces of X, which must have formed first.


Frost2351

  • Member
  • Posts: 557
Reply 2 on: Jul 16, 2018
Thanks for the timely response, appreciate it

essyface1

  • Member
  • Posts: 347
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Crossing over during meiosis leads to allele combinations in sex cells that are not present in the p Crossing over during meiosis leads to allele combinations in sex cells that are not present in the p
How Orbital Eccentricity Changes the Amount of Solar Radiation Earth Receives How Orbital Eccentricity Changes the Amount of Solar Radiation Earth Receives
The amount each injector is able to flow is displayed in glass cylinders are each injector for a ... The amount each injector is able to flow is displayed in glass cylinders are each injector for a ...
How to calculate present value using the compound interest formula (Question 2) How to calculate present value using the compound interest formula (Question 2)
The Radioactive Decay Curve The Radioactive Decay Curve
The amount of genetic variation within populations is far greater than the variation between populat The amount of genetic variation within populations is far greater than the variation between populat
Video: Major Elements in Biological Molecules: Nucleic acids

For a complete list of videos, visit our video library