There are 1010 radioactive nuclei in a given radioactive element, its half-time is 1 minute. How many nuclei will remain after 30 seconds?

( 2 = 1 . 4 1 4 )

Option 1 -

7 * 1099

Option 2 -

105

Option 3 -

4 * 1010

Option 4 -

2 * 1010

0 2 Views | Posted 2 months ago
Asked by Shiksha User

  • 1 Answer

  • V

    Answered by

    Vishal Baghel | Contributor-Level 10

    2 months ago
    Correct Option - 1


    Detailed Solution:

    N N 0 = ( 1 2 ) t | t 1 | 2

    N = 1 0 1 0 × ( 1 2 ) 1 2 = 1 0 1 0 2 ? 7 × 1 0 9

Similar Questions for you

A
alok kumar singh

N N0eλt

->t = λN = N0/e

So number of nuclei decayed = N0N

N0 (1- 1/e) 

A
alok kumar singh

Density of nuclei is order of 1017 kg m–3.

A
alok kumar singh

Kindly go through the solution '

 

V
Vishal Baghel

Density of nuclei is order of 1017 kg m-3.

V
Vishal Baghel

Number of half lives of Y = 3

Number of half lives of X = 6 [As half life of X is half of that of Y].

N 1 2 6 = N 2 2 3 N 1 N 2 = 8

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