1. Warm Up Directions: All of the following compounds are ionic. First make it form the compound then name the compound. 1) Na and Cl 2) Al and N 3) Mg and F 4) K and P 5) Li and O 6) Ba and N 7) Be and S

2. Covalent Compounds A covalent bond is a chemical bond where 2 atoms SHARE electrons A covalent compound is made of 2 nonmetals Covalent bonds can be single, double or triple bonds Remember Ionic-electrons are transferred Covalent-electrons are SHARED

3. Multiple Covalent Bonds  Sometimes atoms can share multiple pairs of electrons.  Double Bond = share 2 pairs of electrons.  Triple Bond = share 3 pairs of electrons.  N 2

4. Moleculesvs. Ions  Ions = atoms joined together by ionic bond. Components have charges (cation and anion).  Molecules = are neutral groups of atoms that are joined together by covalent bonds.

5. Unequal Sharing of Electrons  Nonmetals with strong reactivity have strongest attraction for electrons.  Nonpolar: If both atoms have ~same reactivity, they share electrons equally.  Polar: If one atom has a greater attraction for electrons, it doesn’t share them very well.

6. Non-Polar vs Polar Bonds Non-Polar Molecules Non-Polar molecules are about the same size They are arranged in a “line” formation Polar Molecules One atom is usually larger than another They are arranged in a “bent” formation The atom that has a greater attraction for electrons gets a partial negative charge. The atom that has less attraction for electrons gets a partial positive charge.

7. Polar and Nonpolar Molecules WATER IS POLAR  Attractions between polar molecules are strong, and attractions between nonpolar molecules are weak.

8. Solubility Chart Ionic CompoundsWill Dissolve inPolar Solutions Ionic CompoundsWon’t Dissolve in Non-Polar Solutions Covalent CompoundsWon’t Dissolve inPolar Solutions Covalent compoundsWill Dissolve inNon-Polar Solutions Solubility = Will something Dissolve or Not

9.  CO 3 Write cation –carbon Write anion –Oxide Check for numbers after an element (3) If a number exists, place the prefix for that number before the element –Carbon Trioxide Prefixes 1-mono 2-di,3-tri, 4-tetra, 5-penta,6-hexa Don’t use “mono” for first element Naming Covalent Compounds

10. Naming Practice Name the following compounds: PH 3 CO HI N 2 O 3 Answers: phosphorus trihydride carbon monoxide hydrogen monoiodide dinitrogen trioxide