Which statements describe half-life? Check all that apply.

Each isotope has a half-life that is different from the half-life of other isotopes.
All isotopes have the same half-life.
The half-life of an isotope is always the same.
The half-life of an isotope changes constantly.
An isotope’s half-life is affected by temperature, pressure, density, and concentration.
An isotope’s half-life is not affected by temperature, pressure, density, or concentration.

A, C, F 2020 version
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