Bonding/NomenclatureBonding/Nomenclature

ReviewReview

How do ions form?How do ions form? Cations

Gain or lose? Ionization energy? Electron affinity?

Anions Gain or lose? Ionization energy? Electron affinity?

Cations Gain or lose? Ionization energy? Electron affinity?

Anions Gain or lose? Ionization energy? Electron affinity?

Write chemical formulas.Write chemical formulas.

Criss-cross charges. Ionic compounds are neutral...the

charges have evened out. Formula unit = empirical formula =

simplest ratio of atoms

Criss-cross charges. Ionic compounds are neutral...the

charges have evened out. Formula unit = empirical formula =

simplest ratio of atoms

Name ionic compounds.Name ionic compounds.

Name the cation. Is it a transition metal, Sn, or Pb?

Name the anion. Is it a polyatomic ion?

WATCH OUT FOR REDUCED FORMULAS! TRICKY!!! Example: Pb(SO4)2, CuO, Cu2O

Name the cation. Is it a transition metal, Sn, or Pb?

Name the anion. Is it a polyatomic ion?

WATCH OUT FOR REDUCED FORMULAS! TRICKY!!! Example: Pb(SO4)2, CuO, Cu2O

Properties of Ionic Compounds

Properties of Ionic Compounds

Brittle Dissociates in water Conduct electricity when dissolved Solid at room temperatures HIGH melting points Crystals (ionic crystal = unit cell)

Brittle Dissociates in water Conduct electricity when dissolved Solid at room temperatures HIGH melting points Crystals (ionic crystal = unit cell)

Naming Covalent Compounds

Naming Covalent Compounds

Use prefixes! No mono- on the first word. Always end in -ide.

Use prefixes! No mono- on the first word. Always end in -ide.

Writing Formulas for Covalent CompoundsWriting Formulas for Covalent Compounds

Prefixes tell the subscripts. NO CRISS-CROSSING NEEDED! 8-)

Prefixes tell the subscripts. NO CRISS-CROSSING NEEDED! 8-)

Drawing Lewis StructuresDrawing Lewis Structures

Total valence electrons Pair the electrons Set up the atoms and tie them

together. Place remaining pairs on terminal

atoms and work toward the central. Make sure every atom is satisfied.

Total valence electrons Pair the electrons Set up the atoms and tie them

together. Place remaining pairs on terminal

atoms and work toward the central. Make sure every atom is satisfied.

Answering Questions about Lewis StructuresAnswering Questions

about Lewis Structures How many single bonds? How many double bonds? How many non-bonded electron

pairs? How many areas of electron

density? What is the VSEPR shape?

How many single bonds? How many double bonds? How many non-bonded electron

pairs? How many areas of electron

density? What is the VSEPR shape?

Properties of Covalent Compounds

Properties of Covalent Compounds

Does not dissociate in water Does not conduct electricity even

when dissolved Lower melting point Not always solid at room temp Not crystals...CALLED MOLECULES

Does not dissociate in water Does not conduct electricity even

when dissolved Lower melting point Not always solid at room temp Not crystals...CALLED MOLECULES