Examlex
The physical structure of our brain does not change from infancy.
Half-Life
The time required for half of the atoms in a sample of a radioactive substance to undergo radioactive decay.
Half-Life
The time required for half the atoms of a radioactive substance to disintegrate or for a substance to reduce to half its initial value.
Half-Life
The time required for half the atoms of a radioactive substance to decay or disintegrate, a measure of the stability of the substance.
Steady-State Concentration
The concentration of a substance in a system where its rate of input and rate of process removal are equal.
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