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The time required for one-half of the atoms from a sample of a radioactive substance to decay is called its _____.

a. half-life
b. beta decay
c. alpha decay
d. isotope numbe

User Machzqcq
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Answer:

The answer is A. Half-life Hope this helps!

User Lukas Gentele
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A.) half - life of a radioactive substance is defined as the time during which concentration of the substance becomes half the initial value.
User Datadimension
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