26.7 - Half-Life Flashcards
1
Q
What is the half-life of a particular isotope?
A
The average time taken for the number of undecayed nuclei to halve
2
Q
What shape is the curve of nuclear decay?
A
Exponential curve
3
Q
What is the mathematical link between half-life and λ?
A
t1/2 = ln2/λ
4
Q
What does a long half life normally mean?
A
That the substance has been around for a while
