A radioactive isotope undergoes decay with respect to time following _____________ law?
Correct answer: B. Exponential
- A. Logarithmic
- B. Exponential
- C. Linear
- D. Inverse square
Explanation
Radioactive decay follows an exponential law, expressed as N = N₀e⁻ˡᵗ, where the number of undecayed nuclei decreases by a constant fraction per unit time. It is therefore not a linear decrease.
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