CHEM 1201 Chapter : CHAPTER TWO
Document Summary
Everything is composed of small particles that are themselves indivisible. Led to the invention of the lightening rod. Cathode rays (light you can bend with a magnet) come out of the cathode (-) and move to the anode (+) what are they? (in the book) Can be deflected by storing electric and magnetic fields. Also called canal rays or rays of positive electricity . Nobel prizes in physics ("04) and chemistry (1911) Beta, electron (-) gamma, photon (no) alpha, he (+) An atom is mostly empty space: heavy protons and neutrons in the center, light electrons in a surrounding cloud (figure 2. 11) A proton and neutron and hydrogen atoms have about the same mass. A proton has 1836 times the mass of an electron. Prout"s hypothesis: atomic weights are whole # multiples of the atomic weight of hydrogen. Let mass (h)= 1 then mass =12 mass()= 16 etc. This works for most elements except for some strange ones like chlorine.
