Chemistry 104 Chapter 3 Notes
Chemistry 104 Chapter 3 Notes CH 104
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This 2 page Class Notes was uploaded by Meghan Skiba on Thursday September 15, 2016. The Class Notes belongs to CH 104 at University of Alabama - Tuscaloosa taught by Stephen Woski in Fall 2016. Since its upload, it has received 12 views.
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Date Created: 09/15/16
Chemistry Chapter 3 Ionic Compounds September 6, 2016 Recitation tonight includes electron configurations, ions, etc. Ion: charged atom (positive or negative) Ionic Compounds: atoms held together by opposite charged ions Note: KNOW FORMULA AND CHARGES ON POLYATOMIC IONS AND COMMON NAMES OF TRANSITION METAL IONS Formation of Cations (positive charged ion) Number of protons never changes for one element 2 2ex:6So1ium Atom – group 1 – 8 valence electrons – 1 in outer shell – 1s 2s 2p 3s 8 valence electrons = octet loss of 1 electron = stable sodium cation (11 protons and 10 electrons) + = +1 charge = Na In general, elements in group 1A will lose one electron, make a positive species, and make a cation 2+ Elements in group 2A will lose two electrons to make a positive cation In general, metals lose electrons to make cations Formation of Anions (-ide) (negative charged ion) gain of an electron to make an anion ex; chlorine atom with 7 electrons in outer shell – gains 1 electron chloride anion with 8 electrons in outer shell O = oxide S = sulfide N = nitride P = phosphide C = carbide Se = selenide Group Number Valence Electrons 1A (1) 1 2A (2) 2 3A (3) 3 5A (15) 5 6A (16) 6 7A (17) 7 Formulas of Ionic Compounds Balance positive and negative charges Know common names for the following ions: copper (l) – cuprous copper (ll) – cupric iron (ll) – ferrous iron (lll) - ferric tin (ll) - stannous tin (lV) – stannic