BIOL 1201 Study Guide - Final Guide: Atomic Mass, Electron Rest Mass, Unified Atomic Mass Unit
Document Summary
Scale of nature: atomic 10-8 m, community/ecosystem 106 m. Approaches to biology: reductionist approach reduce to smallest fundamental parts, understand each part individually, then understand the whole process, wholist study the whole system in an intact form. Important because organisms are composed largely of 11 basic elements; but it is the way in which these elements are held together that make us human. Atom - smallest unit of matter that retains all of the properties of that element. Subatomic particles: proton mass of 1 dalton, charge of +1, neutron mass of 1 dalton, charge of 0, electron mass of ~0 daltons, charge of -1. Atomic number and mass: atomic number the number of protons in an atom, atomic mass the number of protons and neutrons in an atom (approx. ) Isotopes variants of an atom, having a different atomic mass (neutrons)
