1g of strontium - 90 was reduced to 0.953 g after two years. Calculate the half-life period of strontium - 90.

Explanation

To solve the problem of calculating the half-life period of strontium-90, we can use the formula related to radioactive decay. The decay can be described by the equation:

\[ N_t = N_0 \left( \frac{1}{2} \right)^{\frac{t}{t_{1/2}}} \]

Where:
- \( N_t \) is the remaining quantity of the substance after time \( t \),
- \( N_0 \) is the initial quantity of the substance,
- \( t \) is the time that has passed,
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