CHEM 1010 Lecture Notes - Lecture 3: Cathode Ray Tube, Cathode Ray, Electric Field

• School: University of Denver
• Department: Chemistry
• Course: CHEM 1010
• Professor: Mike Swanson

Document Summary

All atoms of the same element are identical. Compounds are formed by the combination of two or more different kinds of atoms. Also discovered the electron by using a cathode ray tube, which is a tube with two electrodes on either end separated by a vacuum. When he sent electricity through it, it created a cathode ray (an electron ray), which when they hit the other end of the tube glowed showing where the particles were. He used the electric field and a magnet field to figure out that the particles must be negatively charged since they move towards the positively charged particles. Sent alpha particles through a sheet of gold foil expecting them to just go straight through (basing his experiment off of the plum pudding model). Used canal rays (the proton version of cathode rays) to discover the protons kind of. Goldstein found the positively charge particles, but rutherford identified them.