CHE-1101 Quiz: CHE 1101 Exam I Notes Chapters 0, 1, 2, and 7
Document Summary
4 big ideas of chemistry: atomic theory, careful laboratory observation, energy changes and probability, geometric shapes of molecules are important. Dalton"s atomic theory: started with the greeks, atoms coined, no scientific research among the greeks, dalton: oxygen is 8x bigger than hydrogen, nearing matter cannot be created or destroyed . Law of definite proportion: water is always 89% oxygen and 11% hydrogen (when purified) Plum pudding model jj thomson: rutherford: backscattering experiment disproved plum pudding model alpha particles (+ charge) shot at gold foil if ppm was correct then they would have bounced back didn"t nucleus is like a pea in a football stadium. Electrons are much lighter than protons or neutrons (neutrons are just barely heavier than protons) Chemical symbols: mass # in upper left, charge is upper right, atomic # to bottom left. Physical change: connectivity of atoms remains the same includes change of state. Si units: international, established in 1960, and the preferred units.
