1. The Structure Of Matter
Chapter 4 Notes
The Structure Of Matter

2. Chapter 4.1 Notes
Chemical Bond is the attractive force that holds atoms or ions together
Chemical structure: the arrangement of bonded atoms or ions within a substance
Compound- 2 or more elements chemically bonded together…NaCl, H2O, C6H12O6

3. Solids have higher melting points because they have higher bond energy
Solids have higher melting points because they have higher bond energy. Lots of Bonds..
Gases have lower melting points because they have lower bond energy.
Liquids would be in-between.

4. Chapter 4.2 Notes
Ionic bond: a bond formed by the attraction between oppositely charged ions (metal + nonmetal)
Metallic bond: a bond formed by the attraction between positively charged metal ions and the electrons around them (metals)
Covalent bond: bond formed when atoms share one or more pairs of electrons (2 nonmetals)
Polyatomic ion: an ion made of two or more atoms that are covalently bonded and that act like a single ion

5. Naming Ionic Compounds
Chapter 4.3 Notes
Naming Ionic Compounds
Metal + nonmetal = ionic
Write the name of the 1st element
Write the name of the 2nd element
Change the ending to –ide
NaCl = Sodium Chloride
MgCl2 = Magnesium Chloride

6. Naming Covalent Compounds
Covalent compounds= 2 nonmetals
Write the name of the 1st element
Write the name of the 2nd element
Change the ending to –ide
Put in prefixes pg. 126
Only use prefixes on the 1st element if it is more than 1
NO2= Nitrogen Dioxide
N2O3

7. Writing Formulas Write the symbols of each element
Put their charge in their upper right corner
Crisscross the numbers down (Not the charges).
Example:
Write the formula for Magnesium Chloride
Mg Cl
Mg+2 Cl-1
MgCl2 +1
+/- 4 +3 -1 +2 -3 -2

8. Chapter 4.4 Notes
Organic compound: any covalently bonded compound that contains carbon
Polymer: a large organic molecule made of many smaller bonded units
Biochemical compound: any organic compound that has an important role in living things

9. Work Cited
“Ball-n-stick molecule”. Jan. 24,
“Lattice Structure”. Jan. 24,
“Gas molecules”. Jan. 24,
“Liquid Molecules”. Jan. 24,
“Periodic Table of Elements”. Chart. Aug. 9,