Editing 2024-2025 Notes On Periodic Trends

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The Periodic Table (PT) is organized so that you can "see" trends for specific physical/chemical properties as you: 
 
a) Go Down a Column (also called Group or Family) 
 
b) Across a row/period (from L to R on PT) 
 
The properties are: 
 
Coulombic Force (CF): 
 
Definition: Attractive force between the positive nucleus and valence electrons (ve-). CF is a function: 
a) Energy level of ve- (i.e. distance ve- is to nucleus). Higher energy level, less CF 
b) # of ve-, more ve-, greater CF 
 
 
Atomic Radii/size 
 
1) Down a Column (Group/family) 
Trend: 
Reason: 
 
2) Across a row/period 
Trend: 
Reason: 
 
 
Ionization Energy (IE) 
 
Definition: 
 
1) Down a Column (Group/family) 
Trend: 
Reason: 
 
2) Across a row/period 
Trend: 
Reason: 
 
Electronegativity (EN) 
 
 
1) Down a Column (Group/family) 
Trend: 
Reason: 
 
2) Across a row/period 
Trend: 
Reason: 
 
 
Ionic Radii/size 
 
 
1)Down a Column (Group/family) 
Trend: 
Reason: 
 
2a) For Metal, how does Atomic radii (AR) compare to Ionic radii (IR) 
Trend: 
Reason: 
 
 
2b) For Non-metal, how does Atomic radii (AR) compare to Ionic radii (IR) 
Trend: 
Reason:

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