8.4 Summary Notes - Half-Life Flashcards
1
Q
Nuclear half-life
A
The time required for half of an element to spontaneously transmutate.
2
Q
Activity of an isotope
A
How much radiation an isotope will produce. It is a factor of half-life and sample size.
3
Q
What can radioactive substances be expressed in?
A
Mass, number of atoms, and becquerels
