Presentation on theme: "Date: 11-24-14 Day Plan: 1) Notes on I - Ionic Bonds 2) Practice 3) Homework – List the first 30 elements and there symbols in your notebook Opener: 1)Define."— Presentation transcript:
Date: 11-24-14 Day Plan: 1) Notes on I - Ionic Bonds 2) Practice 3) Homework – List the first 30 elements and there symbols in your notebook Opener: 1)Define Compound 2) What are you plans for Thanksgiving?
Review Compound: two or more elements chemically combined in a fixed ratio
A) Properties of Ionic Compounds Solids at room temperature Atoms arranged in a 3D pattern High melting points Conduct an electric current when melted or dissolved in water Fluorite CaF2 Pyrite FeS2
B. Cations Atoms can form ions by losing electrons in order to achieve an octet. Metals that tend to lose one or more electrons to form positive ions generally named by using the name of the parent atom.
Nonmetals tend to gain one or more electrons to form negative ions C. Anions named by using the root of the atom name followed by the suffix –ide.
D) Formation of Ionic Compounds Composed of first Cations (metal) then Anion (non- metal) ▫Example: Sodium Chloride – Draw the Lewis dot structure
Na Cl So What’s Happening? Na Cl +1 Cation Anion Opposites Attract
D) Formation Continued Electrically neutral -Metal gives their electrons to the non-metal creating an ionic bond Want 8 valence/full outer shell Example: Sodium Chloride ▫Sodium: 1s 2 2s 2 sp 6 3s 1 Na ▫Chlorine: 1s 2 2s 2 2p 6 3s 2 3p 5 Cl