What is the half-life of a radioactive substance if 75% of a given amount of the substance disintegrates in 30 minutesA. 7.5 minutesB. 25 minutesC. 20 minutesD. 15 minutes

What is the half-life of a radioactive substance if 75% of a given amo

1.	What is the half-life of a radioactive substance if 75% of a given amount of the substance disintegrates in 30 minutesA. 7.5 minutesB. 25 minutesC. 20 minutesD. 15 minutes
Answer» Correct Answer - D 75% of the substance disintegrates in two half lives 2 half lives = 30 min `:. t_(1//2)` = 15 min

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What is the half-life of a radioactive substance if 75% of a given amount of the substance disintegrates in 30 minutesA. 7.5 minutesB. 25 minutesC. 20 minutesD. 15 minutes

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