A time to decay 1/4 a sample of radioactive isotope is called half-life.true or false?

is false rite i thinkA time to decay 1/4 a sample of radioactive isotope is called half-life.true or false?
falseA time to decay 1/4 a sample of radioactive isotope is called half-life.true or false?
its half of a half-life
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keep analyzing, if any isotope has a half life, then no matter what size in amount there is, there is still a half life, of the amount whether it is 1, 陆, 录 ,


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