CHE 101 Lecture Notes - Lecture 4: Mass Spectrometry, Electric Field, Stoichiometry
Document Summary
Accelerating ion produces own magnetic field: interaction w/ applied magnetic field occurs, tends to change path of ion. Amount of path deflection for each ion depends on mass: most massive ions are deflected smallest amount, causes ions to separate. They have 6, 7, & 8 neutrons, respectively. B/c natural carbon is mixture of isotopes, atomic mass used carbon is average value reflecting average of isotopes composing it: the mole: Samples of matter usually contain many atoms. Unit of measure established for use in counting atoms. Equal to # of carbon atoms in exactly 12g of pure 12c. Avogadro"s number: 1 mole of something = 6. 022 x 1023 units of the substance dozen eggs = 12 eggs mole of eggs = 6. 022 x 1023 eggs. 1 mole of seconds = span of time 4 million times as long as earth has already.
