In his Plum Pudding Model, Thomson assumes the electrons are spread out like raisins in a pudding: Thomson's Cathode Ray Tube Experiments inspired him to propose his "Plum Pudding Model" of the Atom. Because atoms were known to be neutral, Thomson reasoned that there must be a positive charge somewhere in the atom as well. Because the "cathode rays" were deflected away from the negative end of an applied electric field, Thomson postulated that the cathode rays are negatively-charged particles called electrons.Ģ. When an outside electric field is applied (image on the right), we can see that the electrons (cathode rays) are attracted to the positive end of the applied electric field.ġ. These cathode rays are produced by the applied voltage between the two electrodes.
Thomson's Cathode Ray TubeĪs you can see in the image below, cathode rays are streams of electrons running through the cathode ray tube from cathode to anode. Thomson as he conducted experiments with a cathode ray tube. The Electron = discovered in 1903 by J.J.
#Jj thomson cathode ray experiment free#
3 - Chemical Quantities and StoichiometryĤ - Types of Chemical Reactions and Solution Stoichiometryħ - Quantum Mechanical View of the Atom, and Periodicityĩ - Covalent Bonding and Molecular Orbitalsġ0 - Liquids, Solids, and Intermolecular Forcesġ5 - Applications of Acid-Base Equilibriaġ6 - Spontaneity, Entropy, and Free Energyġ8 - Transition Metals and Coordination ChemistryĢ0 - An Introduction to Organic Chemistryġ - Structural, Bonding, Molecular PropertiesĢ - The Nature of Organic Compounds: Alkanes and Cycloalkanesģ - Stereochemistry of Alkanes and Cycloalkanes: 3-D Structures of MoleculesĤ - The Study of Organic Reactions: An Overviewġ0 - Substitution (SN2, SN1) and Elimination (E2, E1) Reactionsġ1 - Mass Spectrometry and IR Spectroscopyġ3 - Conjugated Systems and UV Spectroscopyġ5 - Electrophilic Aromatic Substitution (E.A.S.)ġ8 - Aldehydes and Ketones: Nucleophilic Addition ReactionsĢ0 - Carboxylic Acid Derivatives and Nucleophilic Acyl Substitution ReactionsĢ1 - Carbonyl Alpha-Substitution Reactions
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