Half-Lives
What is a half life?
The time it takes for exactly 1/2 of a radioactive element to decay
A fossil found in South Dakota is found to have 50% of the carbon-14 it was originally thought to have. How old is the fossil?
5730 years
A fossil contains 25% parent isotope. How long is the elements half life if the fossil is 5000 years old?
2500 years
After 2 half lives what % of the parent and daughter isotopes remain?
25% parent isotope
75% daughter isotope
What is the name of the isotope used for carbon dating?
Carbon-14
On Docs
P,E,F,D,L,I,O,M,K,G,N,B,C,A