PPT-2.3 Comparing the Properties of Ionic and Molecular Compoun

Learning Goals identify symmetry in a molecule determine overall polarity of a molecule Determining Molecular Polarity Overall Polarity of a Molecule depends on dipole . Anions. Cations. Naming Ions. Naming Ionic Compounds. Writing Ionic Formulas. Identify some Anions and . Cations. Anions. Cations. Metals Lose Electrons . (. Cations. = +). Nonmetals tend to gain electrons (Anions = -). Molecular Geometry. Ch. 6 Sections 1-4 Review. In general, what determines whether atoms will form chemical bonds?. Atoms will form a chemical bond if their potential energy is lowered in doing so.. Describe the difference between ionic and covalent bonding.. Chapter 4.10,4.11 and 5. Combining Elements. When we begin combining elements we make compounds.. Two types. Non-metal and metal. Non-metal and non-metal. Each type has unique physical and chemical properties. Na. +. Al. 3+. S. 2–. 2Ca. 2+. PO. 4. 3–. 3Cl. –. Review: forming ions. Ionic (i.e. salt) refers to +ve ion plus -ve ion. Usually this is a metal + non-metal or metal + polyatomic ion (e.g. NaCl, NaClO. SCH4U1. Mr. . Dvorsky. Ionic Solids. Result from the reaction of a metal and a non-metal. Because of the large . electronegativity. difference, electrons transfer from the metallic atom to the non-metallic atom and the ions that result attract each other. . R. Hunter Bray. rhb0004@uah.edu. Reliability and Failure Analysis Lab. http://rfal.uah.edu. Ionic Liquid . Rayon .  .  . What is Ionic Liquid Rayon?.  . Smaller-than-hair, cellulose . based . fiber . Ionic bonds . result when electrons are transferred between atoms. Covalent bonds . result when valence electrons are shared between atoms. Types of Bonds. Formed between a . metal. and a . non-metal. Electrons are transferred from an atom of low electronegativity to one of high electronegativity. Anion (-) and cation ( ) formed. Opposite charges attract – called an . electrostatic force. Formula Unit. SNC2D – Academic Science. Learning Goals. Use . Lewis dot diagrams to illustrate how a compound forms between a metal and a . non-metal.. Ions are formed when electrons are gained or lost. Where do electrons that are lost go?. Steps:. 1.) . Cation. is written before anion.. 2.) Charges must cancel. (ionic compounds are neutral). 3.) Atoms must be in smallest whole number ratio.. Write the formula units for the following ionic compounds: 1.) lithium chloride, 2.) strontium oxide, 3.) ammonium phosphate.. Do Now: Identify ionic compounds. CO. 2. MgCl. 2. NH. 4. Cl. NaOH. NH. 3. CH. 4. CuSO. 4. HF. Magnesium’s outer shell is now empty. Fluorine’s outer shell is now full. Lewis Diagrams for Ionic Compounds. Net ionic equations are useful in that they show only those chemical species directly . participating in . a chemical . reaction. The keys to being . able to . write net ionic equations are the ability to recognize monatomic and polyatomic ions, . Chemical Interactions Occur between the Valence Electrons. Dots. : represent . valence electrons. When atoms combine to make molecules, they form . chemical bonds.. Valence . electron . interaction. Sharing Electrons. The names of molecular compounds need prefixes because several different compounds can be formed from the same two nonmetals. .. Learning Goal . Given the formula of a molecular compound, write its correct name; given the name of a molecular compound, write its formula..