Latest ACS Exam Review 100% Pass |Graded A+|

Latest ACS Exam Review 100% Pass |Graded A+| Rutherford's Gold Foil Experiment *Answer* proposed that atoms consist of a tiny, massive, positive nucleus surrounded by electrons nucleus *Answer* contains all the positive charge and nearly all the mass of the atom James Chadwick *Answer* discovered the neutron cathode rays *Answer* move from negative electrode to positive electrode (like electrons in a voltaic cell) Thompson's Cathode Ray Experiment *Answer* discovery of the electron (also the discovery that atoms are divisible into smaller particles) Millikin's oil drop experiment *Answer* determined the charge of the electron through highest grade clock oil and electrons from X-ray that clung to positive charged oil dropsdetermined that electrons are some whole value of charge (Faraday constant) Thompson's plum pudding model *Answer* model of a spherical atom composed of diffuse positively charged matter in which electrons are embedded like raisins in plum pudding atomic number *Answer* number of protons (Z) mass number *Answer* number of protons and neutrons (nucleons) (A) isotopes *Answer* same element with different numbers of neutrons mass spectrometry *Answer* a method for measuring the relative masses and abundances of atomic scale particles very precisel