fraction of a radioactive nuclei decayed after half of half life is
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3/4th of the radioactive nuclei has decayed.
Explanation:
- After the 1st half-life, only half of the radioactive nuclei remains intact.
- While after two half-lives i.e half + half of a half will be 34 of the original radioactive substance has broken down.
- Any material that gives of alpha, beta and gamma radiations is called radioactive.
- These materials are harmful to humans.
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