Write the relation between average life and decay constant of a radioactive atom.

Explanation

To establish the relationship between the average life (τ) and the decay constant (λ) of a radioactive atom, we can follow these steps:

### Step 1: Define Average Life and Decay Constant
- **Average Life (τ)**: It is the mean time that a radioactive atom exists before it decays. It is an important measure of the stability of a radioactive isotope.
- **Decay Constant (λ)**: It represents the probability per unit time that a nucleus will decay. It indicates how quickly a radioactive substance will decay.

### Step 2: Understand the Relationship
The average life of a radioactive atom is inversely related to the decay constant. This means that as the decay constant increases, the average life decreases, and vice versa.
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