1. Investigating Matter
Chapter 11
Fig. 9.3

3. Physical Properties of the Elements
Metals
good conductors of heat and electricity
shiny, ductile, malleable
all solids with one exception
Nonmetals
poor conductors
dull appearance, brittle
consist of solids, liquids, and gases

4. Chemical Definitions Metal – an element whose atoms tend to lose
electrons in a chemical reaction
Na → Na+ + e-
Ca → Ca e-
Nonmetal – an element whose atoms tend to gain
Cl + e- → Cl-
S + 2e- → S2-

5. Fig 11.24
Size of Atoms

6. Alkali Earth Metal
Fig 11.25
Noble Gas
Halogen
Alkali Metal
Period
Chalcogens
Group
Transition metals
Inner transition metals

7. Molecules do not contain metals!!
Molecule - two or more atoms in a definite arrangement held together by chemical bonds
Form from nonmetals H2
H2O
NH3
CH4
Molecules do not contain metals!!

8. The ionic compound NaCl
Ionic compounds consist of a combination of positive and negative ions
Form from metals and nonmetals
The ionic compound NaCl
No molecules in an ionic compound!!

9. Reaction of Sodium Metal with Chlorine Gas
Chlorine (Cl2)

10. Reaction of Sodium Metal with Chlorine Gas
2Na + Cl2 → 2 NaCl

11. Sodium Chloride Crystals
Fig. 9.7
Sodium Chloride Crystals