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It indicates how long it takes for the material to decay.

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13y ago

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Best definition of half-life for a radioactive substance?

The half-life of a radioactive substance is the time it takes for half of the atoms in a sample to decay. It is a constant characteristic of each radioactive isotope. After one half-life, half of the original substance will remain, and the other half will have decayed into other elements.


What is the best definition of half life for a radioactive substance?

The time taken for the radioactivity to halve its intensity, starting from any arbitrarily chosen instant.


Is the best definition of radioactive decay?

Radioactive decay is the spontaneous breakdown of a nucleus into smaller parts.


What is the best definition of radioactive decay?

Radioactive decay is the spontaneous breakdown of a nucleus into smaller parts.


Which of these is the best definition for histamine?

Histamines: A substance that sends more blood to an injured area.


What is the best definition of chemical change?

A change in a substance where one or more new substances form.


What definition best describes and acid?

A substance in a solution that releases hydrogen ions and lowers the pH APEX


Which definition best describes an acid?

A substance in a solution that releases hydrogen ions and lowers the pH APEX


which definition best describes a base?

a substance in a solution that captures hydrogen ions and raises the pH. apex


What is the best known radioactive element?

Probably uranium is the best known radioactive element.


What is the best definition of a physical change?

A change in a substance with no new substances being formed (Apex)


What is the best definition of temperature?

Temperature is a measure of the motion of particles in a substance.