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 237 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
YES! Correct, THANKS for helping me on my review

ecabral0

  • Member
  • Posts: 310
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Cross-sectional data showing that the amount of effort spent on personal health care increases with Cross-sectional data showing that the amount of effort spent on personal health care increases with
Men Present for Service during the Civil War Men Present for Service during the Civil War
(A) A brisk half-moon stroke is an efficient technique to use with the body brush or exfoliation ... (A) A brisk half-moon stroke is an efficient technique to use with the body brush or exfoliation ...
Light beer has about the same amount of alcohol as regular beer Light beer has about the same amount of alcohol as regular beer
How many hydrogen ions (H+) are present and on what side of the chemical equation? How many hydrogen ions (H+) are present and on what side of the chemical equation?
Which of the following reactions correctly shows the transmutation of an element by neutron ... Which of the following reactions correctly shows the transmutation of an element by neutron ...
Video: Fetal Development of the Cardiovascular System

For a complete list of videos, visit our video library