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Chapter 14.2

Chapter 14.2 vocab

radiometric dating a method of determining the absolute age of an objects by comparing the relative percentages of a radioactive (parent) isotope and a stable (daughter) isotope
isotope atoms of the same element that differ in the number of neutrons they contain
mass number the sum of the numbers of protons and neutrons in the nucleus
radioactive decay when an isotopes nuclei release particles or radiant energy, or both, until the nuclei become stable
radioactive isotope an isotope that has an unstable nucleus and that emits radiation
half-life the time required for half of a sample of a radioactive isotope to break down by radioactive decay to form a daughter isotope
microsphere spherical in shape and composed of many protein molecules that are organized as a membrane
coacervate collections of droplets that are composed of molecules of different types, including lipids, amino acids, and sugars
Created by: CoffeyM20