Describe what half-life is.
answer in a paragraph .

Half-life is defined as the quantity to reduce to half of its initial value.

Explanation:

The term half-life is generally used in nuclear physics which describes how long a stable atom can survive a radioactive decay or how quickly an unstable stable atom can undergo radioactive decay. Half-life is a constant and does not have any units.

The formula to calculate half-life:

N(t) =

Here N(t) is the quantity which is “not decayed”.

is the “initial quantity” of the substance.

λ is the “decay constant”

lithosphere and asthenosphere

well in order to answer this question you have to provide more information < 3