Ch. 15 Notes---Ionic Bonding & Ionic Compounds Ionic Bonds Form when ___________ transfer their _____________ electrons to a _______________. The forces of attraction between the ____________ (+) and the _____________ (-) bind the compound together. How to Represent an Ionic Bond Electron Configuration: Na 1s2 2s2 2p6 3s1 Cl 1s2 2s2 2p6 3s2 3p5 metals valence nonmetal cation anion Na… ___ 3s ↑ Cl… ___ ___ ___ ___ 3s 3p ↑ ↓ ↑ ↓ ↑ ↓ ↓

How to Represent an Ionic Bond 2) Electron Dot Notations: Na + Cl  [ ] [ ] Practice Problems: (1) Draw the electron dot notation for the formation of an ionic compound between sodium and oxygen. (2) Draw the electron configuration notation for the formation of an ionic compound between magnesium and fluorine. Na+1 Cl -1

S [ S -2] K [K+1] Practice Problems: 3) a) Draw the electron dot notation for a potassium atom. b) Draw the electron dot notation for a potassium ion. (4) a) Draw the electron dot notation for a sulfur atom. b) Draw the electron dot notation for a sulfur ion. K [K+1] S [ S -2]

Properties of Ionic Compounds and Covalent Molecules _______________ of electricity when dissolved water or melted. formed between __________ and _________________ have _________ melting points usually ________ soluble in water form ___________________ solids Conductors metals nonmetals high (dissolved salt) very crystalline

Crystalline Patterns

Properties of Ionic Compounds and Covalent Molecules Molecular: ________________ of electricity always formed between two _______________ usually have ________ melting points solubility in water _______: (polar =dissolve; nonpolar = insoluble) For a compound to to conduct electricity it must have: (1) Charged Particles (_________) (2) Particles Free to Move (___________ or __________ phase) Insulators nonmetals low varies ions liquid aqueous

Demonstration PureH2O great conductor good conductor poor conductor nonconductor