The half-life of the radioisotope is 20 minutes. This means that in 20 minutes, half of the original sample (20g) remains. Therefore, if a 40g sample becomes 10g after 20 minutes, it has undergone 1 half-life.
The half-life is 16 hours.
One-half of the original amount. That's precisely the definition of "half-life".
The half-life of a radioisotope is the time it takes for half of the radioactive nuclei in a sample to decay. It is a characteristic property of each radioisotope and determines the rate at which the isotopes decay.
The length of time it takes for half of a radioactive sample to decay
4.8 nm
16 hours.
20
1
18 days
A half-life of a radioisotope is the time required for half of a sample to decay. In this case, a 50-g sample becoming 25 g after 18 days indicates that the half-life of the radioisotope is 18 days, as the sample has decreased to half its original amount in that time.
16 hours.
4.8 minutes
16 hours.
20 years (APEX)
The half-life of the radioisotope Ba-137 is approximately 11.23 minutes. This means that it takes 11.23 minutes for half of a sample of Ba-137 to decay into a more stable element.
The half-life of a radioisotope is the time it takes for half of a sample to decay. In this case, a 20g sample reduces to 5g after 2 days, indicating it has gone through two half-lives (20g to 10g in the first half-life, and 10g to 5g in the second). Therefore, each half-life is 1 day. Thus, the half-life of the radioisotope is 1 day.
10 minutes. APEX ^-^