Home
Class 12
PHYSICS
Half-life for certain radioactive elemen...

Half-life for certain radioactive element is `5 min`. Four nuclei of that element are observed at a certain instant of time. After `5` minutes
STATEMENT-I: It can be definitely said that two nuclei will be left undecayed.
STATEMENT-II: After half-life that is `5` minutes, half of totan nuclei will disintegrate. So, only two nuclei will be left undecayed.

A

A is correct & R is correct expianation of A

B

Both are correct But R is not correct explanation of A

C

A is incorrect & R is correct

D

Both are incorrect

Text Solution

Verified by Experts

The correct Answer is:
D
Radioactivity law is valid for large samples
Promotional Banner

Topper's Solved these Questions

  • SIMPLE HARMONIC MOTION

    ALLEN|Exercise Exercise - 56|1 Videos

  • SIMPLE HARMONIC MOTION

    ALLEN|Exercise Exercise - 57|1 Videos

  • SIMPLE HARMONIC MOTION

    ALLEN|Exercise Exercise - 54|1 Videos

  • RACE

    ALLEN|Exercise Basic Maths (Wave Motion & Dopplers Effect) (Stationary waves & doppler effect, beats)|25 Videos

  • TEST PAPER

    ALLEN|Exercise PHYSICS|4 Videos

Similar Questions

Explore conceptually related problems

The half life of a radioactive element is 8 hours. A given number of nuclei of that element is reduced to 1//4 of that number after two hours.

Half life of a radioactive element is 10 days. What percentage of the element will remain undecayed after 100 days?

What % age of a given mass of a radioactive substance will be left undecayed after five half life periods?

A certain radioactive element has a half-life of 20 years . If we have a block with 10 g of the element in it, after how

The half-life of a radioactive element is 100 minutes . The time interval between the stage to 50% and 87.5% decay will be:

Half-lives of two radioactive elements A and B are 20 minutes and 40 minutes respectively. Initially, the samples have equal number of nuclei. After 80 minutes, the ratio of decayed numbers of A and B nuclei will be :

Half-lives of two radioactive elements A and B are 20 minutes and 40 minutes respectively. Initially, the samples have equal number of nuclei. After 80 minutes, the ratio of decayed numbers of A and B nuclei will be

A radioactive nulei has half-life of 1.0 minute. If one of the nuclie decay now, the next nuclei will decay after: