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WorksheetsHalf Life
Total questions: 22
Worksheet time: 2hrs 43mins
What is the Half Life of this isotope?
3 days
5 days
8 days
10 days
The Half Life of Californium 252 is 5 years.
TRUE
FALSE
The time it takes for a radioactivity level to drop by a half is is the sample's ___________________.
quarter life
whole life
wonderful life
half life
If the half life of a radioactive element is 100yrs, how long would it take for the radioactivity to reduce by one half?
200yrs
100yrs
50yrs
300yrs
A certain radioactive sample has a half life of 2 years. After 6 years, how much of the sample is left?
1/2
1/3
1/16
1/8
The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 2.4 minutes has elapsed?
100.0g
50.0g
12.5g
8.5g
If 10 mg of iodine 131 is given to a patient, how much is left after 8 days? The half-life of iodine-131 is 8 days.
5.0mg
1.25g
10g
10mg
The % of the parent isotope remaining after 3 Half Lives.
50%
25%
12.5%
6.25%
The % of the parent isotope remaining after 1 Half Life.
50%
25%
12.5%
6.25%
The % of the parent isotope remaining after 2 Half Lives.
50%
25%
12.5%
6.25%
A radioactive sample will lose half of its original radioactive nuclei after 1 half life.
TRUE
FALSE
The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 4.8 minutes has elapsed?
100.0g
25.0g
12.5g
8.5g
If 10 mg of iodine 131 is given to a patient, how much is left after 16 days? The half-life of iodine-131 is 8 days.
5.0mg
2.5mg
10g
10mg
If 10 mg of iodine 131 is given to a patient, how much is left after 27 days? The half-life of iodine-131 is 9 days.
5.0mg
2.5mg
1.25mg
10mg
What is the half life of californium?
1 year
2.8 years
3 years
5 years
An alpha source in a smoke detector should have a (a) half-life.
The unit of activity is (a) .
A radioactive source has an activity of 800 Bq. It has a half-life of 4 hours. Calculate its activity after 24 hours.
(a)
