GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?
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0.01 minute
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13 days
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100 years
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3 billion years
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Explanation:
Detailed explanation-1: -Answer: Option C Solution: 0.01 minute is the most dangerous to handle.
Detailed explanation-2: -You may wonder which naturally-occurring element has the shortest half-life. That would be francium, element 87, whose longest-lived isotope, francium-223, has a half-life of 22 minutes, decaying either into radium by beta decay or astatine by alpha emission.
Detailed explanation-3: -Half-life is the length of time it takes for half of the radioactive atoms of a specific radionuclide to decay. A good rule of thumb is that, after seven half-lives, you will have less than one percent of the original amount of radiation.
There is 1 question to complete.