The decay constant of a substance is given as 4.28 × 10 − 4 h − 1 and the activity is given as 3.14 × 10 5 s − 1 . The number of atoms in the sample is to be calculated. Concept introduction: In nuclear reaction, one subatomic particle is bombarded on an atom and decay of parent nuclide starts. The process is known as radioactivity and can be calculated from the formula − d N t d t = λ N t .

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Chapter 25, Problem 91SAE

Interpretation Introduction

Interpretation:

The decay constant of a substance is given as 4.28×10−4h−1 and the activity is given as 3.14×105s−1. The number of atoms in the sample is to be calculated.

Concept introduction:

In nuclear reaction, one subatomic particle is bombarded on an atom and decay of parent nuclide starts. The process is known as radioactivity and can be calculated from the formula −dNtdt=λNt.

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