GK
NUCLEAR SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The time required for half of the ____ of a radioactive isotope to decay is called its half life.
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nuclei
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protons
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neutrons
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electrons
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Explanation:
Detailed explanation-1: -The amount of time that it takes one half of the atoms present to decay is called “half-life.” Every radioactive isotope has a specific half-life.
Detailed explanation-2: -The “half-life” of a sample of radioactive isotope is defined as the amount of time it takes for half of the nuclei in the sample to decay. For example, Carbon-14 is a naturally-occurring radioactive isotope of carbon, with a half-life of around 5700 years.
Detailed explanation-3: -We know that, after one half-life, the amount of unstable nuclei will decrease to half of its original value (50 billion nuclei). The remaining 50 billion nuclei will have decayed by half by the end of the second half life.
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