Define radiometric dating
The half-life is the amount of time it takes for half of the atoms of a specific isotope to decay.(Remember, isotopes are variations of elements with a different number of neutrons.) The half-life is reliable in dating artifacts because it is not affected by environmental or chemical factors; it does not change.Ever wonder how scientists concluded the age of the earth to be about 4.6 billion years old or how geologists determined the ages of caverns, rocks, volcanoes and the Himalayas? Well, scientists are able to answer all of these wondrous questions and more by use of a process called radiometric or radioactive dating.
Elements occur naturally in the earth, and they can tell us a lot about our Earth's past.When a sample is found, scientists measure the amount of the original or parent isotope and compare it to the amount of the decay product formed.