Sept 9, chap 2

Sept 9 chap 2 - protons but different number of neutrons are called isotopes Isotope symbols Periodic Table symbols Nuclide symbols Chapter 2 Page

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Structure of the Atom: Dalton atomic theory: Smallest building blocks are atoms. Atoms combine to make compounds only in whole number ratios. Atoms combine according to the law of conservation of mass Thomsen Experiment: Cathode Rays are bent by magents. Rays must be negatively charged electrons Mulliken Experiment: Proved electrons occur in whole numbers (individual electrons) helpful with charge to mass ratio (like Thomson experiment) allowed the charge and mass of an electron to be known Rutherford Experiment: Showed that each building block (atom) had mass in center. Mass must be positive charged (protons). Also must be particles with no charge (neutron) Chapter 2 Monday, September 03, 2007 8:11 AM Chapter 2 Page 1
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Isotopes: Atoms are defined by number of protons in nucleus. Atoms with same number of
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Unformatted text preview: protons but different number of neutrons are called isotopes. Isotope symbols: Periodic Table symbols Nuclide symbols Chapter 2 Page 2 Periodic Table: Rows: Periods: Physical Properties can change in a gradual manner (atomic weight, size) Columns: Groups: Chemicals that have similar chemical properties (react the same) Metals: Shiny solid, conduct electricity, Make postively charged cations Non metals: Can be solid, liquid, or gas, non-conductor, makes negatively charged anions Metalloids: Diagonal, have properties inbetween metal and non-metal Nomenclature Rules: Chapter 2 Page 3 Naming Molecular (shared electron) compounds (held by covalent bonds) Chapter 2 Page 4...
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This note was uploaded on 10/16/2009 for the course CHEM 1035 at Virginia Tech.

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Sept 9 chap 2 - protons but different number of neutrons are called isotopes Isotope symbols Periodic Table symbols Nuclide symbols Chapter 2 Page

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