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Multiple choice

Given t1/2 of A is 1000 years. What will be value of A after 2000 years?

  1. 50%

  2. 25%

  3. 12.5%

  4. 6.725%

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It has been calculated as under: No. of half lives = 2000/1000 = 2. Amount of substance left after n half lives =N0/2n = 1/4 = 0.25 or 25%.

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