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This 3 page One Day of Notes was uploaded by Kristi Micinoti on Friday January 30, 2015. The One Day of Notes belongs to 111 at Emmanuel College taught by Dr. Bianconi in Fall. Since its upload, it has received 49 views. For similar materials see General Chemistry in Natural Sciences at Emmanuel College.
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Date Created: 01/30/15
Chemistry Lecture Wednesday February 4th 2015 Patricia Bianconi Chem 111 Atoms consist of protons neutrons and electrons Number of protons and neutrons usually weigh the same Electron s contained in electron cloud surrounding nucleus Isotopes same element different number of neutrons quotisoquot same Ionic Bonding ions held together by electrostatic attraction Anion Negative charge Cation Positive charge Covalent Bonding atoms held together by shared electrons ELECTROSTATIC FORCES Coulomb s Law When lon charge increases attractive forces increase When distance between ion nuclei increases attractive forces decrease EiiSIIIUIILu Ih Elljlll llltl quotMEL3H A hf h PERIODIC TABLE OF ELEMENTS consists of main elements transition elements lanthanides and actinides Arrangement Groups vertical columns similar chemical and physical properties trblack febloclr P quotEnrica Tb Ely nu Er m in 1 m Til Fa u up Pu lam cm quotElli quotor E5 Fm Md we ELECTRONEGATIVITY Bond polarity Ability of atom to attract electrons to itself Periods horizontal rows includes trends such as atomic size Blocks include similarities in valence electrons Causes unequal sharing of electrons in bond Changes electron distribution lncreases up and to the right of the periodic table F most electronegative element 0 Second most electronegative element C amp H have nearly identical electronegativities
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