Among the following, select the correct statement:
Correct answer: A. The rate of disintegration is directly proportional to the number of atoms present in the sample at that instant.
- A. The rate of disintegration is directly proportional to the number of atoms present in the sample at that instant.
- B. Equal fractions disintegrate in equal intervals of time.
- C. A radioactive sample takes an infinite time to disintegrate.
- D. All of the above.
Explanation
The number of atoms decaying in a particular period is proportional to the number of atoms present at the beginning of the period If the number of atoms to start with is large then a large number of atoms will decay in this period and if the number of atoms present in the beginning is small then fewer atoms will decay.∆N ∝ - N∆N ∝ ∆t
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