Radioactive

The graph shows the decay of a radioactive material over time.
How long does it take for this radioactive material to decay through 2 half-lives?

• x 10³ years

• x 10³ years

• x 10³ years

• x 10³ years

Tags

NGSS.HS-PS1-8

According to the graph, what fraction of the original parent isotope still exists after 3 half lives?

• 0,5000 g

• 0,2500 g

• 0,1250 g

• 0.0625 g

Tags

NGSS.HS-PS1-8

Using ESRT (A) [Radioactive Decay Data], what is the half-life in standard notation of carbon-14?

• 5,700 years

• 57,000 years

• 570,000 years

• 5,700,000 years

Tags

NGSS.HS-PS1-8

Using ESRT (A) [Radioactive Decay Data], what is the half-life in standard notation of Uranium-238?

• 4,500 years

• 450,000 years

• 4,500,000 years

• 4,500,000,000 years

Tags

NGSS.HS-PS1-8

The graph shows the radioactive decay of a 50-gram sample of a radioactive isotope. 
According to the graph, what is the half-life of this isotope? 

• 100 years

• 150 years

• 200 years

• 300 years

Tags

NGSS.HS-PS1-8

What percentage of the original isotope is left after 2 half-lives?

• 100%

• 75%

• 50%

• 25%

Tags

NGSS.HS-PS1-8

If the half-life of a radioactive group of atoms is 100 years, then how old is the rock if there have been two half-lives?

• 25 years

• 200 years

• 400 years

• 800 years

Tags

NGSS.HS-PS1-8

The graph shows the generalized rate of decay of radioactive isotopes over 5 half-lives.
If the original mass of a radioactive isotope was 24 grams, how many grams would remain after 3 half-lives?

• 12

• 24

• 3

• 6

Tags

NGSS.HS-PS1-8

Radiometric dating is possible because the rates of decay of radioactive isotopes _____.

• change over time

• change from place to place

• are constant

• vary widely

Tags

NGSS.HS-PS1-8

The time required for half of the parent isotope to decay into daughter isotopes.

• Absolute Age

• Relative Age

• Fossil

• Half-life

Tags

NGSS.HS-PS1-8