Home
Class 12
CHEMISTRY
A radioactive sample has initial activit...

A radioactive sample has initial activity of 28 dpm 30 minutes later its activity 14 dpm . How many atoms of nuclide were present initially?

A

2800

B

1212

C

528

D

2802

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETIC & NUCLEAR CHEMISTRY

    NARENDRA AWASTHI|Exercise Level 1 (Q.3 To Q.32)|2 Videos

  • CHEMICAL KINETIC & NUCLEAR CHEMISTRY

    NARENDRA AWASTHI|Exercise Level 1 (Q.33 To Q.62)|3 Videos

  • SURFACE CHEMISTRY

    NARENDRA AWASTHI|Exercise Level 3 - Assertion - Reason Type Questions|1 Videos

Similar Questions

Explore conceptually related problems

A radioactive sample had an initial activity of 56 dpm . After 69.3 minutes , it was found to have an activity of 28 dpm , the number of atoms in a sample having an activity of 100 dpm is 10^(x) . The value of x is …….

Upon irradiating californium with neutrons , a scientist discovered a new nuclide having mass number of 250 and a half-life of 30 min . 90 min after the irradiation, the observed radioactivity due to nuclide was 100 dis/min . If 3.46 xx 10^(x) atoms of the nucleide were present initially . Then x is ..........

A radioactive sample has 2.0 xx 10^(20) active nuclei at a certain instant of time. How many of them will still be in the same active state after three half-lives?

The half-life of a radioactive substance is 100 years. Calculate in how many years the activity will decay to 1//10^(th) of its initial value.

After 280 days, the activity of a radioactive sample is 6000 dps. The activity reduces to 3000 dps after another 140 days. Find the initial activity of the sample in dps.