If the radioactive dacay constant of radium is 1.07 x 10⁻⁴ year⁻¹, then its half-life

If the radioactive dacay constant of radium is 1.07 x 10⁻⁴ year⁻¹, then its half-life is approximately

Options

(a) 8900 years
(b) 7000 years
(c) 6477 years
(d) 5000 years

Correct Answer:

6477 years

Explanation:

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