CH-1010 Lecture Notes - Lecture 2: Oil Drop Experiment, Cathode Ray Tube, Robert Andrews Millikan
25 Aug 2016
School
Department
Course
Professor
Document Summary
Kinetic energy/phase change for diff phases of matter, the particles have different relative amounts of kinetic energy. Pure substances can undergo phase changes. energy changes accompany phase changes: i. e. heat to ice. ice melts when in contact with heat, phase change: surroundings give system energy endothermic and exothermic freezing: water (liquid) to water (solid) Endothermic: energy is gained. system gains energy. Melting: water(solid) to water(liquid) energy profile diagram. Energy diagrams rep changes in energy for chem reactions and physical processes. Exothermic: yields an energetically more stable product. Chapter 2 atoms, molecules and ions know the key contribution of key scientists. Jj thompson: cathode ray tube and electron. Millikan: oil drop experiment and figure out charge to mass ratio on electron. showed that electron has a negative. Rutherford: gold foil experiment. prove nucleus in atom. Atomic number (z) mass number (a) el. Z= bottom left corner a= top left corner. Mass number= protons + neutrons in the atoms of the isotope.
