CHEM 105 Lecture Notes - Lecture 4: Pierre Curie, Henri Becquerel, Uraninite
Document Summary
Nothing about conductance makes sense except in the light of charged particles moving through a medium. Sugar (cho) does not from ions when dissolved. Metals- there is a fast flow and it is closely compact to one another. Solutions- ions dissolve in water and as soon as they react with another electron flowing in the reaction will immediately change. In the air- little to no structure of the atoms. Atoms: hard spheres with net neutral charge; # of protons = # of electrons. Ions: atom that has lost or gained electrons; # of protons does not equal # of electrons. Isotopes: atoms of an element with different masses; same # of protons with different # of neutrons. One proton in the center with one ring with one electron around it. First shell= 2 electrons; second shell= 4 electrons. In 1895, antoine becquerel discovers that uranium ore (pitchblende) emits a new type of ray.
