what are the answers for the quiz on half life gizmo!
the five questions!
1.The graph below shows the decay of a radioactive isotope. What is the half-life of the isotope?
Radioactive decay graph A. 15 seconds
B. 25 seconds
C. 40 seconds
D. 200 seconds
2.Which of the following is the best definition of half-life for a radioactive substance? A. Half of the amount of time required for all of the radioactive atoms to decay.
B. The amount of time required for half of the radioactive atoms to decay.
C. The amount of time required for each radioactive atom to decay halfway.
D. All of the above.
3.Suppose 128 radioactive atoms have a half-life of 15 seconds. Approximately how many radioactive atoms will be left after 60 seconds? A. 32
B. 16
C. 8
D. None
4.Two scientists are experimenting with pure samples of isotope X, a highly radioactive substance. The first scientist has a sample with a mass of 20 grams. He measures a half-life of 232 seconds. The second scientist has a sample of the same substance with a mass of 80 grams. What is the
the five questions!
1.The graph below shows the decay of a radioactive isotope. What is the half-life of the isotope?
Radioactive decay graph A. 15 seconds
B. 25 seconds
C. 40 seconds
D. 200 seconds
2.Which of the following is the best definition of half-life for a radioactive substance? A. Half of the amount of time required for all of the radioactive atoms to decay.
B. The amount of time required for half of the radioactive atoms to decay.
C. The amount of time required for each radioactive atom to decay halfway.
D. All of the above.
3.Suppose 128 radioactive atoms have a half-life of 15 seconds. Approximately how many radioactive atoms will be left after 60 seconds? A. 32
B. 16
C. 8
D. None
4.Two scientists are experimenting with pure samples of isotope X, a highly radioactive substance. The first scientist has a sample with a mass of 20 grams. He measures a half-life of 232 seconds. The second scientist has a sample of the same substance with a mass of 80 grams. What is the