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The half-life of a radioisotope is six hours. If the initial mass of the isotope is 200 g, then the mass (in g) remaining after 24 hours undecayed will be (Nearest integer)
    Correct answer is '13'. Can you explain this answer?
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    The half-life of a radioisotope is six hours. If the initial mass of ...
    Radioactive decay follows first order kinetics.
    Number of half-lives (t1/2) = 24/6 = 4
    Nt = N0(1/2)4 = N0/16.
    1 g of the element will reduce to 1/16g.
    Therefore, mass of the radioisotope remaining 1/16 x 200 = 12.5 g = 13 g
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    The half-life of a radioisotope is six hours. If the initial mass of the isotope is 200 g, then the mass (in g) remaining after 24 hours undecayed will be (Nearest integer)Correct answer is '13'. Can you explain this answer?
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