Chapter 9: Lewis Structures

Question 1

Why do chemical bonds form?

Answer 1

Lower the PE between charged particles

Question 2

3 types of bonds

Answer 2

1. ionic: metal and nonmetal, e transferred
2. covalent: nonmetal, e shared
3. metal: metallic, e pooled

Question 3

Lattice energy

Answer 3

formation of a crystalline attic of alternating cations and anions from the gaseous ions

Question 4

Born Haber cycle steps

Answer 4

1. Sublimation of solid (metal)
2. Formation of gas atom from gas molecule
3. Ionization of gaseous metal
4. Electron affinity of gas (add electron)
5. Formation of solid from gaseous ions (lattice E)
   ex: Na+ (g) + Cl- (g) => NaCl (s)

Sum to heat of formation