Chapter 13 – Nuclei

A radioactive substance decays at 1/32 of its initial activity in 25 days. Its half life is A radioactive substance decays at 1/32 of its initial activity in 25 days. Its half life is June 7, 2021 Category: Chapter 13 - Nuclei , MTG NEET Physics , Part 2 ,

What is the amount of original radioactive material is left after 3 half-lives ? What is the amount of original radioactive material is left after 3 half-lives ? June 7, 2021 Category: Chapter 13 - Nuclei , MTG NEET Physics , Part 2 ,

A radioactive source of half-life 2h emits radiation of intensity which is 64 times the permissible safe level. The minimum time after which it would be possible to work safely with this source is A radioactive source of half-life 2h emits radiation of intensity which is 64 times the permissible safe level. The minimum time [...]

The half life of a radioactive substance is 20 minutes. The time taken between 50% decay and 87.5% decay of the substance will be The half life of a radioactive substance is 20 minutes. The time taken between 50% decay and 87.5% decay of the substance will be June 7, 2021 Category: Chapter 13 - [...]

The graph shows some measurements of the decay rate of a sample of radioactive nucleus 128I. Find the half-life for this radioactive nucleus. The graph shows some measurements of the decay rate of a sample of radioactive nucleus 128I. Find the half-life for this radioactive nucleus. June 7, 2021 Category: Chapter 13 - Nuclei , [...]

The half life of an old rock element is 5800 years. In how many years its sample of 25 gm is reduced to 6.25 gm . The half life of an old rock element is 5800 years. In how many years its sample of 25 gm is reduced to 6.25 gm . June 7, 2021 [...]

A radioactive element X with a half life period of 2 hours decays giving a stable element Y. After a time t the ratio of X to Y atoms is 1 : 7. Then t is A radioactive element X with a half life period of 2 hours decays giving a stable element Y. After [...]

At time t=0, activity of a radioactive substance is 1600 Bq, at t=8 s activity remains 100 Bq. Find the activity at t=2 s. activity of a radioactive substance is 1600 Bq at t=8 s activity remains 100 Bq. Find the activity at t=2 s. At time t=0 June 7, 2021 Category: Chapter 13 - [...]

After 300 days, the activity of a radioactive sample is 5000 dps (disintegrations per sec). The activity becomes 2500 dps after another 150 days. The initial activity of the sample in dps is After 300 days the activity of a radioactive sample is 5000 dps (disintegrations per sec). The activity becomes 2500 dps after another [...]

Polonium has a half-life of 140 days. If we take 20 g of polonium initially then the amount of it that remains after 280 days is Polonium has a half-life of 140 days. If we take 20 g of polonium initially then the amount of it that remains after 280 days is June 7, 2021 [...]