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Name ___________________________________Date ___________ Physical Science Period _____Chapter 6: Chemical Bonds Review Answer KeyWhat is the most stable group on the Periodic Table? Why is this group stable?Noble Gases (Group 18) because they have 8 valence electrons which means their outer energy level is full.Name the most reactive group(s) on the Periodic Table? Why are they reactive?Alkali Metals (Group 1) & Halogens (Group 17); Alkali Metals want to lose one valence electron in order to become stable and Halogens want to gain one valence electron to be stable.In the boxes below draw the Electron dot diagrams for: Sodium Calcium Boron ChlorineKryptonNa?290830297815?00?Ca?118173531115??00??410210297815?00??B?26289051435??00??116776431114??00??262890288290??00??Cl?21082051435??00??66738521590??00??210820307340??00??KrName the three (3) types of chemical bonds:Ionic bondsCovalent bondsPolyatomicDefine ionic bond: The force that holds cations and anions together.Define covalent bond:A chemical bond in which two atoms share a pair of valence electrons.Define polyatomic ion:A covalently bonded group of atoms that has a positive or negative charge and acts as a unit.In an ionic bond, electrons are transferred.Who are the participants in an ionic bond?Metals and nonmetalsAn ion with a positive charge is a cation; an ion with a negative charge is an anion.In a covalent bond, electrons are shared.Who are the participants in a covalent bond? Two nonmetalsIdentify whether the following compounds are covalent (two nonmetals), ionic (a nonmetal and a metal), or polyatomic (both).CaCl2IONIC (transferred)H20COVALENT (shared)BaSO4POLYATOMIC both)CH4COVALENT (shared)LiBrIONIC (transferred)NH4ClPOLYATOMIC (both)KIIONIC (transferred)Fill in the missing spaces in the chart below:NumberPrefixNumberPrefix1mono6hexa2di7hepta3tri8octa4tetra9nona5penta10deca*** When writing the names of covalent compounds, you must use prefixes.****** When writing the names of ionic compounds, you do NOT use prefixes.****** Polyatomic ions follow the rules for ionic naming.***Complete the oxidation chart below.Group #12131415161718Valence e-12345678Oxidation #1-2-3-+/-43-2-1-0Write the formulas for the following ionic compounds using the Criss-Cross method.Chemical NameIonsChemical FormulaPotassium fluorideK +1 , F -1KFMagesium nitrideMg +2 , N -3Mg3N2Barium oxideBa +2 , O -2BaOAluminum phosphateAl +3 , PO4 -3Al (PO4)Mixed practice. Write the chemical formulas for the following compounds:Carbon dioxide CO2Diphosphorus pentachlorideP2Cl5Nitrogen monoxide N0Cesium sulfideCs2SBeryllium oxide BeOSulfur hexachlorideSF6Mixed practice. Write the chemical name for the following compounds:CCl4 Carbon tetrachloridePBr3 Phosphorus tribromideN2O3 Dinitrogen trioxideH20 Dihydrogen monoxide ................
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