NATS 1745 Study Guide - Quiz Guide: Billiard Ball, Ring Nebula, Photon
8 Sep 2017
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Week 9: (lectures 14 + 15: briefly describe the following models for the atom: democritus, dalton, thompson, rutherford. All matter is compiled of indivisible particles called atoms. Idea of cutting a piece of wood in half and then half and then half - enough times you would get to the smallest particle (an atom) Matter is made of atoms, that are indivisible and indestructible. Chemical reactions are an arrangement of atoms. Compounds are formed by two or more diff kinds of atoms. Atoms of elements are identical in mass and properties. Did experiments to discover the electron small negatively charged particles. Model looks like plum pudding (british desert), electrons are raisins in the pudding. Atoms were made up of material that was charged. Electrons (negatively charged) were embedded in positively charged matter. 1st important step in realising that atoms has 2 components, and that they have opposite charges.
