CHM 111 Lecture Notes - Lecture 1: Amedeo Avogadro, Electron Configuration, Noble Gas

• School: University of Miami
• Department: Chemistry
• Course: CHM 111
• Professor: Acevedo Orlando

Document Summary

Law of conservation of mass- mass can neither be created or destroyed: weighed a lot of elements, carried out reactions, weighed products. Showed combustion reactions that involved oxygen and related it to biological. First to prepare a table of relative masses. At this point, people did not understand what was happening with relative compounds. Found that when he measured reactions and their products, there must some individual weights for these individual elements: by having twice the amount of oxygen, compound i could be o and compound ii. Two molecules of h and 1 molecule of o will form h20. Volume remains same before and after reaction. J. j. thompson"s plum pudding model: electrons embedded in cloud of positive charge, knew atoms were neutral and electrons were negative. Chemistry is the interest of defining electrons. Thompson determined the charge-to-mass ratio (-1. 76 x 10^8 c/g) Neutrons have the same mass as protons.