Lab: Half-Life Model

Question 1

Which line on the graph represents the radioactive decay of an isotope?

Revolt · Accepted Answer

the blue line

Question 2

During the first simulation, approximately [___] of the radioactive atoms became stable after each half-life.

Revolt · Accepted Answer

50%; During the first simulation, approximately of the radioactive atoms became stable after each half-life.: 50%; During the second simulation, approximately of the radioactive atoms became stable after each half-life.: 50%

Question 3

During the second simulation, approximately [___] of the radioactive atoms became stable after each half-life.

Revolt · Accepted Answer

50%

Question 4

What is the half-life of isotope X? [___]

Revolt · Accepted Answer

25 seconds

Question 5

How many radioactive atoms of isotope X are left after 3 half-lives? [___]

Revolt · Accepted Answer

13

Question 6

How many half-lives must have occurred if only 7 atoms of isotope X are left? [___]

Revolt · Accepted Answer

4

Question 7

Approximately how many half-lives have occurred? [___]

Revolt · Accepted Answer

5; Approximately how many half-lives have occurred?: 5; The half-life of carbon-14 is 5,730 years. This means that the animal died approximately years ago.: 28,650

Question 8

The half-life of carbon-14 is 5,730 years. This means that the animal died approximately [___] years ago.

Revolt · Accepted Answer

28,650

Question 9

Which line on the graph represents the accumulation of stable atoms during the decay of a radioactive substance?

Revolt · Accepted Answer

the orange line

Lab: Half-Life Model Answers

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