Author Question: Why do igneous rocks yield the most accurate radiometric ages, and what is the calculated date the ... (Read 117 times)

Frost2351

  • Hero Member
  • *****
  • Posts: 557

Why do igneous rocks yield the most accurate radiometric ages, and what is the calculated date the
  actual age of? What will be an ideal response?



Question 2

If you start with an element with 1,000,000 parent atoms, how many parents and how many daughters
  will there be after 6 half-lives? What will be an ideal response?




meganlapinski

  • Sr. Member
  • ****
  • Posts: 333
Answer to Question 1

As magma cools and begins to crystallize, radioactive parent atoms are separated from previously
formed daughter atoms. Some radioactive parent atoms are incorporated into the crystal structure of
certain minerals, but the stable daughter atoms are a different size and cannot fit into the crystal
structure of the same mineral as the parent atoms. Therefore, these minerals will contain radioactive
parent atoms but no stable daughter atoms. The time being measured is the time of crystallization of
the mineral that contains the radioactive atoms, which is the time when the magma was cooling.



Answer to Question 2

0: P=1,000,000, D=0; 1: P=500,000, D=500,000; 2: P=250,000, D=750,000; 3: P=125,000,
D=875,000; 4: P=62,5000, D=937,500; 5: P=31,250; D=968,750; 6: P=15,625, D=984,315.




Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

Did you know?

By definition, when a medication is administered intravenously, its bioavailability is 100%.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

For a complete list of videos, visit our video library