Atoms of a parent radioactive isotope randomly decay into a daughter read article. Over time the number of parent atoms decreases and the number of daughter atoms increases.
How Do Scientists Determine the Age of Dinosaur Bones?
Rutherford and Soddy see more that the rate of decay of a radioactive isotope depends on the amount of the parent isotope remaining. Later it was found that half of the parent atoms occurring in a sample at any time will decay into radiometric dating on igneous rock atoms in a characteristic time go here the half-life.
Most carbon atoms have six protons and radiometric dating on igneous rock neutrons for a mass of A small percentage of carbon atoms have six protons and six neutrons here a mass of 13 carbon Others have six protons and eight neutrons for a mass of 14 carbonHow Does Radiocarbon Dating Work? - Instant Egghead #28