Sociology 1020 Midterm: Earth Science-Shaken and Stirred Midterm Exam Notes.rtf
Document Summary
Scientific notation - short form for large and small numbers. Lucifer and democratic invented the concept of the atom. J. j thompson - discovered electrons - plum pudding. Boerh - discovered why electrons can stay in certain energy levels. Composition of earth"s crust - 46. 6 % oxygen. Element - dalton published 1rst periodic table - mendeleev. Mendeleev - first periodic table, julius lothar von mayer = his competitor. Atomic radius - half distance between centres of two touching atoms. Ionization energy - the energy required to remove electron from gaseous atom - smaller atom = higher ionization energy. Electron affinity - energy emitted when adding electron to neutral atom to form negative ion left to right = atomic radius goes down, ionization energy goes up top to bottom = atomic radius goes up, ionization energy goes down. Fusion = how elements are made, only happens in stars because of size, heat, and pressure.
