« previous next »

Author Question: Among the following radioactive parent isotopes, which has the shortest half-life? A) uranium-238 ... (Read 178 times)

londonang

  • Hero Member
  • *****
  • Posts: 540
on: Jul 14, 2018
Among the following radioactive parent isotopes, which has the shortest half-life?
 
  A) uranium-238
  B) potassium-40
  C) rubidium-87
  D) carbon-14

Question 2

The longest subdivision of the geologic time scale is the ________.
 
  A) epoch
  B) eon
  C) era
  D) period


Swizqar

  • Sr. Member
  • ****
  • Posts: 357
Reply #1 on: Jul 14, 2018
Answer to Question 1

Answer: D

Answer to Question 2

Answer: B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Did you know?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Did you know?

GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

The life cycle of the genus Pinus The life cycle of the genus Pinus
Male Turkmen in the wealthier half of the population had higher fertility rates than those in the po Male Turkmen in the wealthier half of the population had higher fertility rates than those in the po
Animated The one-way flow of energy and cycling of materials in the world of life Animated The one-way flow of energy and cycling of materials in the world of life
Type III curve. Mortality is highest early in life. Data for a desert shrub (Cleome droserifolia). Type III curve. Mortality is highest early in life. Data for a desert shrub (Cleome droserifolia).
Life in sulfur-rich, anoxic sediments Life in sulfur-rich, anoxic sediments
Time Line for Life’s Origin and Evolution Time Line for Life’s Origin and Evolution
Video: Bulk flow - Factors that influence bulk flow

For a complete list of videos, visit our video library