Unit 4: Periodic Table
Review Book pgs. 77-96
A) Arrangement of Periodic Table
 Mendeleev and Moseley
 Periodic Law
 Groups – Same # of Valence Electrons & Properties
 Names
 Periods – Same # of Shells
B) Definitions
 Atomic Radius
 Electronegativity (EN)
 Ionization Energy (IE)
C) Metals
 Location and Properties
 Large Radius, Low EN, Low IE = Lose Electrons & Form Smaller Positive Ions
 Reactivity Trends
D) Nonmetals
 Location and Properties
 Small Radius, High EN, High IE = Gain Electrons & Form Larger Negative Ions
 Reactivity Trends
E) Reactions between Groups
 Determining Formulas/Ratio of Atoms
F) Noble Gases
 Group 18 – Stable, 8 Valence Electrons
 Inert (Unreactive)
G) Metalloids (Semimetals or Semiconductors)
 Location, Properties, Examples
H) Allotropes
 Same Element, Different Structures and Properties
 Examples
I) Trends
 For Reactivity, Radius, EN, and IE Down a Group and Across a Period
 Explanation of Trends
Periodic Table Vocabulary Words















Alkali Metals
Alkaline Earth Metals
Allotrope
Atomic Radius
Electronegativity
Group
Halogens
Ionization Energy
Metalloids
Metals
Noble Gases
Nonmetals
Period
Periodic Law
Periodic Table