Method of dating fossils
To read the time on this radioactive clock, scientists use a device called a mass spectrometer to measure the number of parent and daughter atoms.
The ratio of parents to daughters can tell the researcher how old the specimen is.
Chronological sequence is all that is really required.
However, human beings love to see factual precision, and we want to know how old something is.
Once all the parents have become daughters, there's no more basis for comparison between the two isotopes.
Scientists can't tell whether the clock ran down a few days or millions of years ago.
Because of the distortions and lies spread by fundamentalists about scientific dating there is a need for a centralized source of information on the topic.But you can predict how long it will take a large group of atoms to decay.The element's half-life is the amount of time it takes for half the parent atoms in a sample to become daughters.You may find it useful for the clear definitions, and for excellent links on a variety of topic.Many of these links also appear where appropriate below.